CN112767091B - Block chain-based method, device and medium for processing supervision bidding and privacy - Google Patents
Block chain-based method, device and medium for processing supervision bidding and privacy Download PDFInfo
- Publication number
- CN112767091B CN112767091B CN202110125856.1A CN202110125856A CN112767091B CN 112767091 B CN112767091 B CN 112767091B CN 202110125856 A CN202110125856 A CN 202110125856A CN 112767091 B CN112767091 B CN 112767091B
- Authority
- CN
- China
- Prior art keywords
- bidding
- node
- index
- blockchain
- party node
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000012545 processing Methods 0.000 title claims description 6
- 230000008569 process Effects 0.000 claims abstract description 37
- 238000003672 processing method Methods 0.000 claims abstract description 20
- 238000012546 transfer Methods 0.000 claims description 30
- 238000012797 qualification Methods 0.000 claims description 28
- 239000011159 matrix material Substances 0.000 claims description 26
- 238000011156 evaluation Methods 0.000 claims description 24
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000012502 risk assessment Methods 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 3
- 239000013598 vector Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006399 behavior Effects 0.000 abstract description 4
- 238000012795 verification Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000004422 calculation algorithm Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 11
- 230000008520 organization Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012550 audit Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012384 transportation and delivery Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/06—Buying, selling or leasing transactions
- G06Q30/0601—Electronic shopping [e-shopping]
- G06Q30/0611—Request for offers or quotes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/06—Buying, selling or leasing transactions
- G06Q30/08—Auctions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Theoretical Computer Science (AREA)
- Finance (AREA)
- Accounting & Taxation (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Strategic Management (AREA)
- General Business, Economics & Management (AREA)
- Marketing (AREA)
- Economics (AREA)
- Development Economics (AREA)
- Bioethics (AREA)
- General Health & Medical Sciences (AREA)
- Computer Hardware Design (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Technology Law (AREA)
- Entrepreneurship & Innovation (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention discloses a block chain-based manageable bidding and privacy processing method, device and medium. The invention introduces the private database and the supervisor, can avoid the fraud such as revealing the bidding bottom and the like in the bidding process, and the supervisor has the access authority of all bidding process data, can supervise and examine the bidding whole process, better restrict the behaviors of the bidding party and the bidding party, and ensures the fairness of bidding activities and the privacy of related data of all parties. The whole bidding business process is digitalized, paper documents are electronic, bidding efficiency is greatly improved, cost and resource waste are reduced, and verification of various documents is facilitated.
Description
Technical Field
The invention relates to the technical field of blockchains, in particular to a method, equipment and medium for processing manageable bidding and privacy based on blockchains.
Background
The bidding is the behavior that a bidding person (buyer) composes a bidding document, issues a purchasing demand notice or invitation, describes the names and addresses of the bidding persons, the nature, quantity, implementation place and time of bidding items, and the like, obtains the issuance of the bidding document, and invites specific or non-specific bidders (sellers) to bid according to a certain program at a prescribed time and place.
The bidding is that a bidder compiles a bidding document according to the bidding document requirements, responds to the substantive requirements and conditions set forth by the bidding document, and delivers the bidding document to the bidder within the validity period.
As shown in fig. 1, the conventional bidding process is generally divided into the following stages:
the preparation stage: specific arrangements are made for the entire process of bidding activities including performing a argumentation of the bidding project, determining the purchasing scheme, compiling the bidding document, specifying the bid evaluation method, component bid evaluation mechanisms, inviting related personnel, etc.
Issuing a bid advertisement: bid invitations are issued in specified newspapers or media, or bid invitations are issued to invitees.
Qualification screening: the signer qualifies the provider for which the bid is of interest.
Bidding: the bidder creates a bid document, seals and marks the bid document and delivers the bid document to the bid location at a specified expiration time.
And (5) opening a label: the bidding ceremony is held, and the bidding signer performs the bidding ceremony in a public manner at a prescribed time, place and program according to the bidding bulletin (or bidding invitation).
Evaluation of the mark: the bid evaluation committee evaluates the bid documents and forms bid evaluation conclusion.
Scaling: and determining a winning bid, and contracting with the winning bid according to the regulations.
The conventional bidding process has the following disadvantages:
(1) the bidding process involves a large number of paper documents, which are not easy to store and lose, and the tampering possibility exists;
(2) the whole bidding process needs multiparty cooperation, and the off-line mode is low in efficiency;
(3) the bidding process is opaque and there is a possibility that the bidding party and bidding party may cross, such as revealing the bid bottom to help a particular bidder bid.
Disclosure of Invention
The invention provides a block chain-based manageable bidding and privacy processing method, which aims to solve the technical problems of low bidding activity efficiency, high cost and high risk and easiness in leakage of the conventional bidding.
The technical scheme adopted by the invention is as follows:
a block chain-based method for processing supervision-based tendering and privacy comprises the following steps:
the bidding party node invokes intelligent contract ST1 (ZT) to issue bidding information, the process requires endorsements of the bidding party and the supervisor, and the bidding information is uploaded to the blockchain in a public form;
the bidding party node calls an intelligent contract ST1 (T), the bidding qualification information is uploaded and stored in a public account book in a Hash form after consensus, the specific content is stored in a private database PDC (T) of the bidding party node, the bidding party node then sends the specific content contained in the Hash data to the bidding party node, and the bidding party node stores the specific content in an under-chain database OFD (Z);
the bidding party node receives the examination data, verifies whether the examination data accords with the data Hash uploaded to the blockchain by the bidding party, checks whether the bidding party node has bidding qualification, and if so, informs the bidding party node to transfer the bidding guarantee to a specified bank account;
the bidder node receives the notification, transfers the required deposit to the appointed bank account, and notifies the bank node to upload the transfer record to the blockchain;
the bank node calls an intelligent contract ST1 (B), the bidding party node transfer information is uploaded to a blockchain, a channel account book can retain the Hash of the transfer record, the specific content is stored in a private database PDC (B) of the bank node, and the bidding party node is informed of guaranteeing the payment information;
when the payment date of the gold is cut off, the bidding party node calls an intelligent contract ST2 (z), the examination result is uploaded to the blockchain in a Hash mode, whether bidding qualification is disclosed in a column or not is judged, and the specific content of Hash data is stored in a private set PDC (ZJ) shared by the bidding party node and the supervisor node;
after determining that the bidding qualification exists, the bidder node calls an intelligent contract ST1 (T), and uploads bidding information (such as quotation, scheme and the like) to a blockchain public ledger in a Hash form, wherein specific contents are stored in a private database PDC (T) of the bidder node;
when the bid opening date is reached, the bidding party node reads bidding information of each bidding party node and stores the bidding information in an under-chain database OFD (Z);
the bidding party node evaluates the bidding books of the bidding party nodes, determines the bidding results, invokes the intelligent contract ST3 (Z), and issues the bidding results to the blockchain in a public form (selectively publishes a part of non-sensitive information);
if each bidding party node has no objection to the central result, after the publishing period is finished, the bidding party node informs a banking node to refund the guarantee of each bidding party node, the banking node calls an intelligent contract ST1 (B), the transfer record Hash is uploaded to a blockchain, specific information is stored in a private database PDC (B) of the banking, and the bidding party node are informed of transfer information;
the bidding party node and the bidding party node sign a contract, an intelligent contract uploading contract is called and uploaded to a blockchain public account book in a Hash form, and specific contents are stored in a private database PDC (ZT) shared by the bidding party node and the bidding party node.
Further, the smart contract ST1 (T) is further used to ensure that the bidding party node can read specific bidding information of the bidding party node through the smart contract ST1 (T) after the bidding deadline has elapsed.
Further, after the bidding party node issues the bid winning result to the blockchain in a public form and before the publishing period is finished, the bidding party node further comprises the steps of:
other bid-bidder nodes that did not bid view the bid-winning result and request supervisor intervention if the result is objectively (considered to be better than the bid-winning party, such as lower bid, etc.).
Further, after the bid qualification is disclosed in the column, the method further comprises the steps of:
and informing the bidder node, checking whether the bidder node owns the bidding qualification according to the identity ID when the bidder node registers on the blockchain, and inquiring the bidder node or reflecting the bidder node in an off-line mode if the result is in doubt.
Further, the bidding party node evaluates the bid-casting book of each bidding party node, and the determining of the bid-winning result specifically comprises the following steps:
establishing an index system: the index system comprises a total target A, a primary index B and a secondary index C, wherein the total target is a bidding enterprise credit risk assessment value, and the primary index comprises a non-financial index and a financial index; the secondary indexes comprise enterprise qualification grade indexes of subordinate and non-financial indexes, high-management personnel credit indexes, law litigation indexes in the last three years, poor performance record indexes, and asset liability condition indexes, enterprise incomes and enterprise profit margin indexes of subordinate financial indexes;
establishing a judgment matrix: the weight coefficient of the same level factor is obtained from high to low, and the weight coefficient comprises the weight coefficient of the first-level index to each factor of the total target and the weight coefficient of the second-level index to each factor of the first-level index;
after obtaining the judgment matrix, if the judgment of each evaluation expert is inconsistent, checking the consistency of the thinking of a decision maker by adopting a common consistency index CI, wherein the CI is expressed as follows:
wherein lambda is max For the maximum eigenvalue of each judgment matrix, n is the index number, and comparing CI with the average random consistency index RI, the random consistency ratio CR is obtained:
when the random consistency ratio CR is smaller than or equal to a set threshold value, the judgment matrix is considered to have consistency, the evaluation is reliable, otherwise, the expert is required to re-evaluate;
solving a combination weight coefficient: according to the weight coefficient of each factor of the first-level index and the weight coefficient of each factor of the second-level index to the first-level index, obtaining the combined weight coefficient of each factor of the second-level index to the total target influence
Risk calculation: according to the obtained combination weight coefficient of the influence of each factor of the secondary index on the total targetThe evaluation committee can obtain the credit risk evaluation value of the bidding enterprise by using the scores of the factors of the secondary index:
wherein: r represents the credit risk value of bidding enterprises, and C represents the grading of the secondary index by the evaluation committee on each factor:
C＝(c 1 ,…,c 7 ) T ；
determining a winning result: classifying the credit of the bidder into excellent, good, general and poor according to the obtained credit risk assessment value of the bidder; in connection with bidding of bidders, bidders with lowest bid prices are selected from bidders with credit levels not lower than "normal" or "good" depending on the importance of the item.
Further, the establishing a judgment matrix: the weight coefficient of the same level factor is obtained from high to low, the weight coefficient of the first level index to each factor of the total target and the weight coefficient of the second level index to each factor of the first level index are included, and the method specifically comprises the following steps:
first, the expert of the evaluation Committee performs all factors in the first-level index BComparing two by two to obtain a value b ij ，B A ＝(b ij ) 2×2 For the judgment matrix of the first-level index relative to the total target A, record B A The largest characteristic root of (a) isBelonging to->The standard feature vectors of (a) are: />Omega then B1 ，ω B2 The weight coefficient of the primary indexes B1 and B2 after the ranking according to the importance degree or preference of the total target A is given;
similarly, a judgment matrix of the secondary index C1 … C7 relative to the primary indexes B1 and B2 can be obtained, and is expressed as follows:
and the weight coefficient of each factor of the secondary index to each factor of the primary index is expressed as:
further, the calculation method for calculating the combination weight coefficient of the influence of each factor of the secondary index on the total target is as follows:
further, in the consistency checking step, the values of the 1-9-order judgment matrix RI are 0, 0.58, 0.90, 1.12, 1.24, 1.32, 1.41 and 1.45, respectively, and the set threshold is 0.1.
In another aspect, the invention provides an electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the blockchain-based supervisable bidding and privacy processing method when executing the program.
In another aspect, the present invention provides a storage medium, where the storage medium includes a stored program, and when the program runs, controls a device in which the storage medium is located to execute the block chain-based supervisable bidding and privacy processing method.
The invention has the following beneficial effects:
according to the block chain-based supervised bidding and privacy processing method, all bidding information is concentrated and shared on the chain through the block chain, and the bill is electronic and the business flow is digitized by utilizing the technical scheme of combining the block chain technology, asymmetric encryption, a Hash algorithm, digital signature, intelligent contracts, a privacy data set and identity authentication, so that the trouble that bidding parties find bidding information from various channels is avoided, and meanwhile, bidding parties can find better bidding parties from more bidding enterprises conveniently. The private database (namely the private data set) is adopted, so that bidding information in the whole bidding process can be prevented from being revealed, the problem that the bidding party can reveal the bottom bid in the traditional bidding process is avoided, and fairness in the bidding process is guaranteed. The supervisor has access rights to all bidding process data, can supervise and examine the whole bidding process, and better restrict the behaviors of the bidding party and the bidding party. The whole bidding business process is digitalized, paper documents are electronic, bidding efficiency is greatly improved, cost and resource waste are reduced, and verification of various documents is facilitated.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The invention will be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram of a conventional bidding process.
FIG. 2 is a block chain network deployment diagram of a block chain based supervisable bidding and privacy processing method of a preferred embodiment of the present invention.
FIG. 3 is a flow chart of a blockchain-based supervisable bidding and privacy processing method in accordance with the preferred embodiment of the present invention.
FIG. 4 is a timing diagram of a blockchain-based supervisable bidding and privacy processing method in accordance with another preferred embodiment of the present invention.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For ease of understanding, the following explains the multi-party nodes and technical terms involved in the blockchain network in the blockchain-based manageable bidding and privacy handling method.
The block chain technology is a distributed account book technology which connects blocks in sequence according to time sequence, combines the blocks into a chain data structure, distributes and stores the chain data structure in each participant uniformly, and ensures that the data cannot be tampered and counterfeited in a cryptographic way. The technology provides a mechanism for exchanging trusted information with value delivery in an environment where there is no witness to an authoritative center.
Smart contract technology, a smart contract is essentially a piece of programming written in some computational programming language that is stored in a container provided by a blockchain system and that automatically runs when triggered by some extrinsic or intrinsic condition. In response to the real world, the smart contract is implemented by using a computer language to ensure that a machine automatically performs a predetermined smart contract calculation under certain conditions, and the rule cannot be tampered once fixed.
Private database refers to a collection of actual private data and hash values of private data in a blockchain (the hash values are protected with random salts). The private data is stored on a private database of the authorizing organization node, which can be accessed by the authorizing node, and the ordering node cannot influence the private database nor see the private data. The hash value of the private data is written into the account book of each node on the chain after being endorsed and ordered, and the hash value can be used for state verification as a proof of the transaction.
The asymmetric encryption technology is different from the symmetric encryption, keys used in encryption and decryption processes of the asymmetric encryption are different and divided into public keys and private keys, when the public keys are used for encrypting data, the data can be decrypted only by the corresponding private keys, when the private keys are used for encrypting data, the data can be decrypted only by the corresponding public keys, and currently, the frequently used asymmetric encryption algorithms are RSA algorithm and elliptic curve algorithm (ECSDA).
The Hash algorithm is a very basic and important computer algorithm that can map binary plaintext strings of arbitrary length into shorter binary strings of fixed length (Hash values), and it is difficult for different plaintext strings to be mapped to the same Hash value. An excellent Hash algorithm can realize the following functions: forward speed, reverse difficulty, input sensitivity, collision avoidance, and thus, the Hash algorithm is also called fingerprint (fingerprint) or digest (digest).
The identity authentication adopts a digital signature technology to realize reliable identity authentication, and the digital signature has uniqueness relative to a signer in use by utilizing a cryptography principle, so that counterfeiting of a digital signature is not computationally possible, and the true identity of the signer can be identified through the digital signature, and the digital signature cannot be repudiated.
Aiming at the defects existing in the prior art, the technical scheme adopted by the invention relates to four roles of a bidding party, a supervision organization and a bank in business. Corresponding to the blockchain network, expressed as: the bidding node, the supervision node and the banking node are also provided with ordering nodes for ordering transactions in the blockchain network. Wherein:
the bidding party node refers to a legal person or other organization that proposes bidding projects, performs bidding with the goal of preferentially selecting bidding parties in bidding activities;
bidder nodes refer to enterprises which respond to bidding and participate in bidding competition;
the supervisor node refers to an organization or organization that supervises bidding activities;
the banking node refers to a legal financial institution that manages a monetary credit transaction, and in particular herein, a legal financial institution that provides financial services for bidding activities.
The ordering node is only responsible for ordering and packaging the transactions and then sending the transactions to each node in the blockchain, and does not participate in verifying the transactions.
Before implementing the present invention, it is first necessary to construct a bidding network, as shown in fig. 2, which includes a bidding party, a supervisor, a bidding party, and a bank. In this network, a private database owned by each node needs to be defined, a corresponding chain code (i.e., smart contract) is installed, and the network structure and the private database owned by each node are described as follows:
private database and in-chain database descriptions
A private database PDC (ZJ) shared by the signer node and the supervisor node and used for storing the examination result;
the private database PDC (ZT) is a private database shared by the bidding party node and is used for storing the contract information after winning bid;
the private database PDC (T) is a private database of the bidder node, and stores the examination information and the bidding information of the bidder node; (the private database can only be written in by the bidding party node, and the bidding party node can also read specific information under certain conditions)
The private database PDC (B) is a private database of the bank node and is used for storing transfer information;
and the private database OFD (Z) is an under-chain database owned by the signer node, and the supervisor node owns the reading authority of the private database.
Smart contract function description
The intelligent contract ST1 (ZJ) is characterized in that the bidding party node is used for issuing a chain code of bidding information, and Z, J in brackets indicates that the bidding party node and the supervisor node need to endorse when the chain code is called;
the intelligent contract ST2 (Z) is that the bidding party node is used for issuing a chain code of the examination result;
the intelligent contract ST1 (T) is characterized in that a bidder node is used for uploading a bid qualification file and a chain code of the bid file, and a tenderer can call the chain code to access the bid file information after the tenderer finishes the bidding;
the intelligent contract ST3 (ZT) is used for signing a chain code of contract uploading contract information after the bidding party node and the bidding party node are scaled;
the intelligent contract ST1 (B) is that the bank node is used for issuing chain codes of transfer information.
The blockchain ledger of the present invention contains two components, world state and blockchain. The world state is a database used for storing a set of the current state of a group of accounts, namely the state that all accounts hold accounts receivable; a blockchain is a transaction log that records all changes that contribute to the current world state, i.e., a record of the flow between all accounts. Transactions recorded in the blockchain change the state of certain accounts, thereby changing the world state of the ledger.
The present invention will be described in detail with reference to the following examples.
As shown in fig. 3, a block chain-based manageable bidding and privacy processing method includes the steps of:
s1, an bidding party node calls an intelligent contract ST1 (ZT) to issue bidding information, the bidding information is uploaded to a blockchain in a public form by the process of endorsements of bidding parties and supervision parties;
s2, calling an intelligent contract ST1 (T) by a bidder node, uploading bidding qualification information, storing the bidding qualification information in a public account book in a Hash form after consensus, storing specific content in a private database PDC (T) of the bidder node, and then transmitting the specific content contained in the Hash data to the bidder node by the bidder node, wherein the bidder node stores the specific content in an off-chain database OFD (Z);
s3, the bidding party node receives the examination data, verifies whether the examination data accords with the data Hash uploaded to the blockchain by the bidding party, checks whether the bidding party node has bidding qualification, and if so, informs the bidding party node to transfer the bidding guarantee to a specified bank account;
s4, the bidder node receives the notification, transfers the required deposit to the appointed bank account, and notifies the bank node to upload the transfer record to the blockchain;
s5, the bank node calls an intelligent contract ST1 (B), the bidding party node transfer information is uploaded to a blockchain, a Hash of a transfer record is reserved on a channel account book, specific content is stored in a private database PDC (B) of the bank node, and the bidding party node is informed to guarantee the payment information;
s6, when the payment date of the guarantee is cut off, the bidding party node calls an intelligent contract ST2 (z), the examination result is uploaded to the blockchain in a Hash mode, whether bidding qualification is disclosed in a column or not is judged, and the specific content of Hash data is stored in a private set PDC (ZJ) shared by the bidding party node and the supervisor node;
s7, calling an intelligent contract ST1 (T) after determining that the bidding qualification exists by the bidder node, uploading bidding information to a blockchain public account book in a Hash mode, and storing specific contents in a private database PDC (T) of the bidder node;
s8, when the bid opening date is reached, the bidding party node reads bidding information of each bidding party node and stores the bidding information in an under-chain database OFD (Z);
s9, the bidding party node evaluates the bidding books of the bidding party nodes, determines a bidding result, invokes the intelligent contract ST3 (Z), and issues the bidding result to the blockchain in a public form (selectively publishes a part of non-sensitive information);
s10, if all bidding nodes have no objection to bidding results, after the publishing period is finished, the bidding node informs a bank node to refund the guarantee of each bidding node, the bank node calls an intelligent contract ST1 (B), the transfer record Hash is uploaded to a blockchain, specific information is stored in a private database PDC (B) of a bank, and the bidding node are informed of transfer information;
s11, signing a contract between the bidding party node and the bidding party node, calling an intelligent contract uploading contract, uploading the contract to a blockchain public account book in a Hash mode, and storing specific contents in a private database PDC (ZT) shared by the bidding party node and the bidding party node.
According to the block chain-based manageable bidding and privacy processing method, all bidding information is concentrated on the chain to be shared through the block chain, and the technical scheme of combining the block chain technology, asymmetric encryption, a Hash algorithm, digital signature, intelligent contracts, a privacy data set and identity authentication is utilized to digitize documents and business processes, so that the trouble that bidding parties find bidding information from various channels is eliminated, and meanwhile, bidding parties are facilitated to find better bidding parties from more bidding enterprises. The private database (namely the private data set) is adopted, so that bidding information in the whole bidding process can be prevented from being revealed, the problem that the bidding party can reveal the bottom bid in the traditional bidding process is avoided, and fairness in the bidding process is guaranteed. The supervisor has access rights to all bidding process data, can supervise and examine the whole bidding process, and better restrict the behaviors of the bidding party and the bidding party. The whole bidding business process is digitalized, paper documents are electronic, bidding efficiency is greatly improved, cost and resource waste are reduced, and verification of various documents is facilitated.
Specifically, the smart contract ST1 (T) is further used to ensure that the bidding party node can read specific bidding information of the bidding party node through the smart contract ST1 (T) after the bidding deadline has elapsed.
In another preferred embodiment of the present invention, after the bidding party node issues the bid-winning result to the blockchain in a public form and before the end of the publishing period, the method further includes the steps of:
and S9a, checking winning results by other bid-winning bidder nodes, and if the results are objectively held (the scheme of the bid-winning bidder node is considered to be superior to that of the winning bidder, such as lower quotation, etc.), requesting intervention of the supervisor, thereby playing a role in supervising the bidding process and ensuring fairness of the bidding process.
In a preferred embodiment of the present invention, after the step of whether the bid qualification is disclosed, the method further comprises the steps of:
s6a, notifying a bidder node, checking whether the bidder node owns bidding qualification according to the identity ID when the bidder node registers on the blockchain, and if the result is in doubt, inquiring the bidder node or reflecting the result to a supervisor node in an off-line mode, so that the bidding process is supervised, and the fairness of the bidding process is ensured.
In a preferred embodiment of the present invention, the bid-bidding-side node evaluates a bid-making book of each bidding-side node, and the determining of the bid-winning result specifically includes the steps of:
s91, establishing an index system: the index system comprises a total target A, a primary index B and a secondary index C, wherein the total target is a bidding enterprise credit risk assessment value, and the primary index comprises a non-financial index and a financial index; the secondary indexes comprise enterprise qualification grade indexes of subordinate and non-financial indexes, high-management personnel credit indexes, law litigation indexes in recent three years, poor performance record indexes, and asset liability condition indexes, enterprise income condition indexes and enterprise profit margin indexes of subordinate financial indexes, and are specifically shown in table 1:
TABLE 1
S92, establishing a judgment matrix: the weight coefficient of the same level factor is obtained from high to low, and the weight coefficient comprises the weight coefficient of the first-level index to each factor of the total target and the weight coefficient of the second-level index to each factor of the first-level index;
s93, consistency test, namely after a judgment matrix is obtained, if the judgment of each evaluation expert is inconsistent, checking consistency of thinking of a decision maker by adopting a common consistency index CI, wherein the CI is expressed as follows:
wherein lambda is max For the maximum characteristic value of each judgment matrix, n is the index number, and CI is compared with the average random consistency index RI to obtain a random consistency ratio CR：
When the random consistency ratio CR is smaller than or equal to a set threshold value, the judgment matrix is considered to have consistency, the evaluation is reliable, otherwise, the expert is required to re-evaluate;
s94, calculating a combination weight coefficient: according to the weight coefficient of each factor of the first-level index and the weight coefficient of each factor of the second-level index to the first-level index, obtaining the combined weight coefficient of each factor of the second-level index to the total target influence
S95, risk calculation: according to the obtained combination weight coefficient of the influence of each factor of the secondary index on the total targetThe evaluation committee can obtain the credit risk evaluation value of the bidding enterprise by using the scores of the factors of the secondary index:
wherein: r represents the credit risk value of bidding enterprises, and C represents the grading of the secondary index by the evaluation committee on each factor:
C＝(c 1 ,…,c 7 ) T ；
s96, determining a winning result: classifying the credit of the bidder into excellent, good, general and poor according to the obtained credit risk assessment value of the bidder; in connection with bidding of bidders, bidders with lowest bid prices are selected from bidders with credit levels not lower than "normal" or "good" depending on the importance of the item.
Specifically, the establishing a judgment matrix: the weight coefficient of the same level factor is obtained from high to low, the weight coefficient of the first level index to each factor of the total target and the weight coefficient of the second level index to each factor of the first level index are included, and the method specifically comprises the following steps:
s921, the expert of the evaluation committee compares all factors in the first-level index B in pairs to obtain a value B ij The definition and explanation are shown in Table 2; b (B) A ＝(b ij ) 2×2 For the judgment matrix of the first-level index relative to the total target A, the judgment matrix B is recorded A The largest characteristic root of (a) isBelonging to->The standard feature vectors of (a) are: />Omega then B1 ，ω B2 The weight coefficient of the primary indexes B1 and B2 after the ranking according to the importance degree or preference of the total target A is given;
table 2:
| degree of relative importance b ij c ij | Definition of the definition | Interpretation of the drawings |
| 1 | Equally important | Target i and target j are equally important |
| 3 | Slightly important | Target i is slightly more important than target j |
| 5 | Is of considerable importance | Target i and target j are important |
| 7 | Is obviously important | Object i and object j are obviously important |
| 9 | Absolute importance of | Target i and target j are of absolute importance |
| 2,4,6,8 | Between two adjacent importance levels |
S922, similarly, a judgment matrix of the second level index C1 … C7 relative to the first level indexes B1 and B2 can be obtained, and the judgment matrix is respectively expressed as follows:
and the weight coefficient of each factor of the secondary index to each factor of the primary index is expressed as:
specifically, the calculation method for calculating the combination weight coefficient of the influence of each factor of the secondary index on the total target is as follows:
specifically, in the preferred embodiment of the present invention, in the consistency checking step, as shown in table 3, the values of the 1-9 order judgment matrices RI are 0, 0.58, 0.90, 1.12, 1.24, 1.32, 1.41, and 1.45, respectively, and the set threshold is 0.1, that is, if CR is less than or equal to 0.1, the judgment matrices are considered to have consistency, and the evaluation is reliable, otherwise, an expert is required to re-evaluate.
TABLE 3 Table 3
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 0.00 | 0.00 | 0.58 | 0.90 | 1.12 | 1.24 | 1.32 | 1.41 | 1.45 |
As shown in fig. 4, in another preferred embodiment of the present invention, there is provided a block chain-based supervisable bidding and privacy processing method, comprising the steps of:
s1, an bidding party node calls an intelligent contract ST1 (ZT) to issue bidding information, the bidding information is uploaded to a blockchain in a public form by the process of endorsements of bidding parties and supervision parties;
s2, calling an intelligent contract ST1 (T) by a bidder node, uploading bidding qualification information, storing the bidding qualification information in a public account book in a Hash form after consensus, storing specific content in a private database PDC (T) of the bidder node, and then transmitting the specific content contained in the Hash data to the bidder node by the bidder node, wherein the bidder node stores the specific content in an off-chain database OFD (Z);
s3, the bidding party node receives the examination data, verifies whether the examination data accords with the data Hash uploaded to the blockchain by the bidding party, checks whether the bidding party node has bidding qualification, and if so, informs the bidding party node to transfer the bidding guarantee to a specified bank account;
s4, the bidder node receives the notification, transfers the required deposit to the appointed bank account, and notifies the bank node to upload the transfer record to the blockchain;
s5, the bank node calls an intelligent contract ST1 (B), the bidding party node transfer information is uploaded to a blockchain, a Hash of a transfer record is reserved on a channel account book, specific content is stored in a private database PDC (B) of the bank node, and the bidding party node is informed to guarantee the payment information;
s6, when the payment date of the guarantee is cut off, the bidding party node calls an intelligent contract ST2 (z), the examination result is uploaded to the blockchain in a Hash mode, whether bidding qualification is disclosed in a column or not is judged, and the specific content of Hash data is stored in a private set PDC (ZJ) shared by the bidding party node and the supervisor node;
s7, calling an intelligent contract ST1 (T) after determining that the bidding qualification exists by the bidder node, uploading bidding information to a blockchain public account book in a Hash mode, and storing specific contents in a private database PDC (T) of the bidder node;
s8, when the bid opening date is reached, the bidding party node reads bidding information of each bidding party node and stores the bidding information in an under-chain database OFD (Z);
s9, the bidding party node evaluates the bidding books of the bidding party nodes, determines a bidding result, invokes the intelligent contract ST3 (Z), and issues the bidding result to the blockchain in a public form (selectively publishes a part of non-sensitive information);
s10, checking bid-winning results by other bid-winning parties, and requesting intervention of a supervisor if the bid-winning party has a fraud phenomenon (the proposal of the bid-winning party is considered to be superior to the bid-winning party, such as lower quotation, etc.) when the bid-winning party has objection;
s11, if all bidding nodes have no objection to the bidding results, after the publishing period is finished, the bidding node informs a bank node to refund the guarantee of each bidding node, the bank node calls an intelligent contract ST1 (B), the transfer record Hash is uploaded to a blockchain, specific information is stored in a private database PDC (B) of the bank, and the bidding node are informed of transfer information;
s12, signing a contract between the bidding party node and the bidding party node, calling an intelligent contract uploading contract, uploading the contract to a blockchain public account book in a Hash mode, and storing specific contents in a private database PDC (ZT) shared by the bidding party node and the bidding party node.
Another preferred embodiment of the present invention provides an electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the blockchain-based supercedable bidding and privacy processing method of the above embodiments when executing the program.
Another preferred embodiment of the present invention provides a storage medium, which includes a stored program, and when the program runs, controls a device in which the storage medium is located to execute the method for performing the block chain-based manageable bidding and privacy processing described in the above embodiment.
It can be seen that the blockchain-based manageable bidding and privacy processing method provided by the above embodiment has the following characteristics:
by utilizing the block chain technology, a bidding system is designed, bidding information of each organization or place is integrated, a bidder can conveniently acquire corresponding bidding information, and meanwhile, the bidder is helped to screen out more suitable bidders.
By means of asymmetric encryption, a Hash algorithm, digital identity, digital signature and a privacy data set technology, bid information cannot be tampered, a bid bidding process can be verified, and post supervision and audit are facilitated.
And adding a supervision node, examining bid-winning information and final bid-winning information, and solving the problem of supervision deficiency in the traditional bid-winning process.
In summary, the invention utilizes the technical scheme of combining the blockchain technology, the asymmetric encryption, the Hash algorithm, the digital signature, the intelligent contract, the privacy data set and the identity authentication, thereby digitizing the bill and the business process, improving the bidding efficiency and reducing the cost. The bidding information is integrated on the blockchain, so that the problem that bidding information is difficult to acquire by bidders is solved, and the bidders are helped to screen out better bidding parties from more bidding enterprises. Meanwhile, a supervision party is introduced, and a privacy data set is added, so that fraud such as revealing of bidding bottoms and the like in the bidding process can be effectively avoided, and fairness of bidding activities and privacy of data of related parties are guaranteed.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
The functions described in the methods of this embodiment, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in one or more computing device readable storage media. Based on such understanding, a part of the present invention that contributes to the prior art or a part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computing device (which may be a personal computer, a server, a mobile computing device or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or an optical disk, or other various media capable of storing program codes.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The block chain-based method for processing the supervision tendering and privacy is characterized by comprising the following steps:
the bidding party node calls an intelligent contract ST1 (ZJ) to issue bidding information, the process requires endorsements of the bidding party and the supervisor, and the bidding information is uploaded to the blockchain in a public form;
the bidding party node calls an intelligent contract ST1 (T), the bidding qualification information is uploaded and stored in a public account book in a Hash form after consensus, the specific content is stored in a private database PDC (T) of the bidding party node, the bidding party node then sends the specific content contained in the Hash data to the bidding party node, and the bidding party node stores the specific content in an under-chain database OFD (Z);
the bidding party node receives the examination data, verifies whether the examination data accords with the data Hash uploaded to the blockchain by the bidding party, checks whether the bidding party node has bidding qualification, and if so, informs the bidding party node to transfer the bidding guarantee to a specified bank account;
the bidder node receives the notification, transfers the required deposit to the appointed bank account, and notifies the bank node to upload the transfer record to the blockchain;
the bank node calls an intelligent contract ST1 (B), the bidding party node transfer information is uploaded to a blockchain, a channel account book can retain the Hash of the transfer record, the specific content is stored in a private database PDC (B) of the bank node, and the bidding party node is informed of guaranteeing the payment information;
when the payment date of the gold is cut off, the bidding party node calls an intelligent contract ST2 (Z), the examination result is uploaded to a blockchain in a Hash mode, whether bidding qualification is disclosed in a column or not is judged, and the specific content of Hash data is stored in a private set PDC (ZJ) shared by the bidding party node and the supervisor node;
after determining that the bidding qualification exists, the bidder node calls an intelligent contract ST1 (T), and uploads bidding information to a blockchain public ledger in a Hash form, wherein specific contents are stored in a private database PDC (T) of the bidder node;
when the bid opening date is reached, the bidding party node reads bidding information of each bidding party node and stores the bidding information in an under-chain database OFD (Z);
the bidding party node evaluates the bidding books of the bidding party nodes, determines the bidding results, invokes intelligent contract ST3 (ZT), and issues the bidding results to the blockchain in a public form;
if each bidding party node has no objection to the central result, after the publishing period is finished, the bidding party node informs a banking node to refund the guarantee of each bidding party node, the banking node calls an intelligent contract ST1 (B), the transfer record Hash is uploaded to a blockchain, specific information is stored in a private database PDC (B) of the banking, and the bidding party node are informed of transfer information;
the bidding party node signs a contract with the bidding party node, invokes an intelligent contract uploading contract and uploads the contract to the blockchain public account book in a Hash form, and the specific content is stored in a private database PDC (ZT) shared by the bidding party node and the bidding party node;
the smart contract ST1 (T) is also used to ensure that the bidding party node can read specific bidding information of the bidding party node through the smart contract ST1 (T) after the bidding deadline has elapsed.
2. The blockchain-based supervisable bidding and privacy processing method of claim 1, further comprising the steps of, after the bidding party node publishes the bid results in a published form on the blockchain, before the end of the publication period:
and other bid-winning bidder nodes check winning results, and if the results are objectively treated, the supervisor is required to intervene.
3. The blockchain-based supervisable bidding and privacy processing method of claim 1, further comprising the steps of, after the step of:
and informing the bidder node, checking whether the bidder node owns the bidding qualification according to the identity ID when the bidder node registers on the blockchain, and inquiring the bidder node or reflecting the bidder node in an off-line mode if the result is in doubt.
4. The block chain based superlative bidding and privacy processing method according to claim 1, wherein the bidding party node evaluates the bid-making of each bidding party node, and the determining of the bid-making result specifically comprises the steps of:
establishing an index system: the index system comprises a total target A, a primary index B and a secondary index C, wherein the total target is a bidding enterprise credit risk assessment value, and the primary index comprises a non-financial index and a financial index; the secondary indexes comprise enterprise qualification grade indexes of subordinate and non-financial indexes, high-management personnel credit indexes, law litigation indexes in the last three years, poor performance record indexes, and asset liability condition indexes, enterprise incomes and enterprise profit margin indexes of subordinate financial indexes;
establishing a judgment matrix: the weight coefficient of the same level factor is obtained from high to low, and the weight coefficient comprises the weight coefficient of the first-level index to each factor of the total target and the weight coefficient of the second-level index to each factor of the first-level index;
after obtaining the judgment matrix, if the judgment of each evaluation expert is inconsistent, checking the consistency of the thinking of a decision maker by adopting a common consistency index CI, wherein the CI is expressed as follows:
wherein lambda is max For the maximum eigenvalue of each judgment matrix, n is the index number, and comparing CI with the average random consistency index RI, the random consistency ratio CR is obtained:
when the random consistency ratio CR is smaller than or equal to a set threshold value, the judgment matrix is considered to have consistency, the evaluation is reliable, otherwise, the expert is required to re-evaluate;
solving a combination weight coefficient: according to the weight coefficient of each factor of the first-level index and the weight coefficient of each factor of the second-level index to the first-level index, obtaining the combined weight coefficient of each factor of the second-level index to the total target influence
Risk calculation: according to the obtained combination weight coefficient of the influence of each factor of the secondary index on the total targetThe evaluation committee can obtain the credit risk evaluation value of the bidding enterprise by using the scores of the factors of the secondary index:
wherein: r represents the credit risk value of bidding enterprises, and C represents the grading of the secondary index by the evaluation committee on each factor:
C＝(c 1 ,…,c 7 ) T ；
determining a winning result: classifying the credit of the bidder into excellent, good, general and poor according to the obtained credit risk assessment value of the bidder; in connection with bidding of bidders, bidders with lowest bid prices are selected from bidders with credit levels not lower than "normal" or "good" depending on the importance of the item.
5. The blockchain-based supervisable bidding and privacy processing method of claim 4, wherein the establishing a decision matrix: the weight coefficient of the same level factor is obtained from high to low, the weight coefficient of the first level index to each factor of the total target and the weight coefficient of the second level index to each factor of the first level index are included, and the method specifically comprises the following steps:
firstly, the expert of the evaluation committee compares all factors in the first-level index B in pairs to obtain a value B ij ，B A ＝(b ij ) 2×2 For the judgment matrix of the first-level index relative to the total target A, the judgment matrix B is recorded A The largest characteristic root of (a) isBelonging toThe standard feature vectors of (a) are: />Omega then B1 ，ω B2 The weight coefficient of the primary indexes B1 and B2 after the ranking according to the importance degree or preference of the total target A is given;
similarly, a judgment matrix of the secondary index C1 … C7 relative to the primary indexes B1 and B2 can be obtained, and is expressed as follows:
and the weight coefficient of each factor of the secondary index to each factor of the primary index is expressed as:
6. the blockchain-based manageable bidding and privacy processing method according to claim 5, wherein the method for calculating the combination weight coefficient of each factor of the secondary index on the total target is as follows:
7. the method according to claim 4, wherein in the step of checking consistency, the 1-9 order judgment matrix RI has values of 0, 0.58, 0.90, 1.12, 1.24, 1.32, 1.41, and 1.45, respectively, and the set threshold is 0.1.
8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the blockchain-based supervisable bidding and privacy processing method of any of claims 1-7 when the program is executed by the processor.
9. A storage medium comprising a stored program, wherein the program, when run, controls a device in which the storage medium is located to perform the blockchain-based supervisable bidding and privacy processing method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110125856.1A CN112767091B (en) | 2021-01-29 | 2021-01-29 | Block chain-based method, device and medium for processing supervision bidding and privacy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110125856.1A CN112767091B (en) | 2021-01-29 | 2021-01-29 | Block chain-based method, device and medium for processing supervision bidding and privacy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112767091A CN112767091A (en) | 2021-05-07 |
| CN112767091B true CN112767091B (en) | 2024-03-01 |
Family
ID=75703734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110125856.1A Active CN112767091B (en) | 2021-01-29 | 2021-01-29 | Block chain-based method, device and medium for processing supervision bidding and privacy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112767091B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114707997A (en) * | 2021-07-23 | 2022-07-05 | 山东浪潮爱购云链信息科技有限公司 | Method and storage medium for preventing malicious competition of tendering and bidding |
| CN113837558A (en) * | 2021-08-31 | 2021-12-24 | 远光软件股份有限公司 | Bidding evaluation method and related device |
| CN113706056A (en) * | 2021-09-23 | 2021-11-26 | 常州市公共资源交易中心 | Bidding unit performance identification early warning method, device, equipment and storage medium |
| CN114626078B (en) * | 2022-03-21 | 2023-02-03 | 江苏仪化信息技术有限公司 | Data security management method and system for material purchase |
| CN117592458B (en) * | 2024-01-19 | 2024-04-05 | 辽宁省网联数字科技产业有限公司 | Digital bidding document blind box analysis method and system based on artificial intelligence |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109684287A (en) * | 2018-12-29 | 2019-04-26 | 厦门链平方科技有限公司 | Gateway information sharing query method and system based on block chain |
| CN109858893A (en) * | 2019-03-12 | 2019-06-07 | 黑龙江世纪精彩科技有限公司 | A kind of bidding contract administration method based on block chain |
| CN110020927A (en) * | 2018-12-11 | 2019-07-16 | 浙江工商大学 | A kind of open Bidding Methods based on block chain |
| CN110503523A (en) * | 2019-08-23 | 2019-11-26 | 宁夏神州好易信息发展股份有限公司 | A kind of e-bidding purchasing system based on block chain technology |
| CN110971656A (en) * | 2018-10-01 | 2020-04-07 | 施耐德电器工业公司 | Secure storage of data in blockchains |
| CN111461486A (en) * | 2020-03-02 | 2020-07-28 | 广州高新工程顾问有限公司 | Project bidding agent information management system based on project management |
| CN111639361A (en) * | 2020-05-15 | 2020-09-08 | 中国科学院信息工程研究所 | Block chain key management method, multi-person common signature method and electronic device |
| CN111681015A (en) * | 2020-06-10 | 2020-09-18 | 复旦大学 | Product tracing method, system and equipment based on alliance chain |
| CN111797415A (en) * | 2020-06-30 | 2020-10-20 | 远光软件股份有限公司 | Block chain based data sharing method, electronic device and storage medium |
| CN112134923A (en) * | 2020-08-14 | 2020-12-25 | 广州大学 | Bidding information processing method, system, device and medium based on block chain |
-
2021
- 2021-01-29 CN CN202110125856.1A patent/CN112767091B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110971656A (en) * | 2018-10-01 | 2020-04-07 | 施耐德电器工业公司 | Secure storage of data in blockchains |
| CN110020927A (en) * | 2018-12-11 | 2019-07-16 | 浙江工商大学 | A kind of open Bidding Methods based on block chain |
| CN109684287A (en) * | 2018-12-29 | 2019-04-26 | 厦门链平方科技有限公司 | Gateway information sharing query method and system based on block chain |
| CN109858893A (en) * | 2019-03-12 | 2019-06-07 | 黑龙江世纪精彩科技有限公司 | A kind of bidding contract administration method based on block chain |
| CN110503523A (en) * | 2019-08-23 | 2019-11-26 | 宁夏神州好易信息发展股份有限公司 | A kind of e-bidding purchasing system based on block chain technology |
| CN111461486A (en) * | 2020-03-02 | 2020-07-28 | 广州高新工程顾问有限公司 | Project bidding agent information management system based on project management |
| CN111639361A (en) * | 2020-05-15 | 2020-09-08 | 中国科学院信息工程研究所 | Block chain key management method, multi-person common signature method and electronic device |
| CN111681015A (en) * | 2020-06-10 | 2020-09-18 | 复旦大学 | Product tracing method, system and equipment based on alliance chain |
| CN111797415A (en) * | 2020-06-30 | 2020-10-20 | 远光软件股份有限公司 | Block chain based data sharing method, electronic device and storage medium |
| CN112134923A (en) * | 2020-08-14 | 2020-12-25 | 广州大学 | Bidding information processing method, system, device and medium based on block chain |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112767091A (en) | 2021-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112767091B (en) | Block chain-based method, device and medium for processing supervision bidding and privacy | |
| US20210390549A1 (en) | Systems and methods for building blockchains for verifying assets for smart contracts | |
| O'Leary | Open information enterprise transactions: Business intelligence and wash and spoof transactions in blockchain and social commerce | |
| Essaghoolian | Initial coin offerings: Emerging technology's fundraising innovation | |
| TWI389046B (en) | Trusted third party clearing house for lead tracking | |
| WO2019217937A1 (en) | Rewards and penalties of the reward function for the attestation game | |
| KR20220035050A (en) | Identity and risk scoring of tokenized assets and associated token transactions backed by government bonds | |
| WO2021041746A1 (en) | Stable digital token processing and encryption on blockchain | |
| US20220318796A1 (en) | Stable token creation, processing and encryption on blockchain | |
| KR102069002B1 (en) | History management method, apparatus and program for preventing fake using blockchain | |
| McJohn et al. | The commercial law of bitcoin and blockchain transactions | |
| US11700123B2 (en) | Asset-backed digital security tokens | |
| US20210110469A1 (en) | Digital hypothecation database system | |
| Frieden | Two-sided Internet markets and the need to assess both upstream and downstream impacts | |
| CN112184274A (en) | Online fulfillment system and method | |
| Baum et al. | Sok: Privacy-enhancing technologies in finance | |
| US20220217154A1 (en) | Email certification system | |
| CN101605140A (en) | The network user's identity verification Verification System and examine authentication method | |
| KR102322578B1 (en) | Commodity trading system and method thereof | |
| Hreinsson et al. | The future of blockchain technology and cryptocurrencies. | |
| US20230055618A1 (en) | Systems and Methods for Management of Token Interactions | |
| KR102431545B1 (en) | Identity authentication system using the transaction details and method thereof | |
| Swanson | Watermarked tokens and pseudonymity on public blockchains | |
| KR102213296B1 (en) | System for matching a job based block chain, and the method for managed by the system | |
| Dempere et al. | Consumer financial fraud in the United Arab Emirates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |