CN107403303B - Signing method of electronic contract system based on block chain deposit certificate - Google Patents
Signing method of electronic contract system based on block chain deposit certificate Download PDFInfo
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- CN107403303B CN107403303B CN201710459414.4A CN201710459414A CN107403303B CN 107403303 B CN107403303 B CN 107403303B CN 201710459414 A CN201710459414 A CN 201710459414A CN 107403303 B CN107403303 B CN 107403303B
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Abstract
The invention discloses a signing method of an electronic contract system based on a block chain deposit certificate, which comprises the following steps: a user creates an electronic contract on the electronic contract platform or uploads the existing electronic contract to the electronic contract platform, and then the electronic contract is signed by using an event certificate issued by a CA; the electronic contract platform records the information of each key node in the contract signing process of the user and the time point of the occurrence of the event and stores the information and the time point of the occurrence of the event in the block chain certificate storage platform; and the notarization part takes out the information from the node of the block chain certificate storage union chain, then decrypts the information by using the key of the user to obtain the specific information signed by the contract, and notarizes the contract of the user. The electronic contract is signed more conveniently, and the time and the cost of a user are saved; the block chain storage and verification system technically ensures that the electronic contract cannot be tampered; the invention not only can not be tampered with, but also records and stores the flow information of contract signing, and can restore the contract signing behavior of the user.
Description
Technical Field
The invention relates to the field of electronic contracts, in particular to a signing method of an electronic contract system based on block chain certificate storage, and specifically relates to a system for electronic contract certificate storage by using a block chain.
Background
The electronic contract transfers the traditional contract signing flow to the internet, the traditional contract signing process requires two parties to sign and post on a paper contract, the whole process is long in time and high in cost, and the electronic contract platform signs the electronic contract through a Certificate issued by a Certificate Authority (CA) of a user, so that the electronic contract platform has the same legal effectiveness. The current electronic contract platform proves that the electronic contract platform does not tamper with the contract by acting as a neutral third party, but technically, the electronic contract platform has the possibility of tampering with the contract content. The block chain technology is very suitable for storing certificates of electronic contracts due to the characteristics that data cannot be tampered and the like. The sharing of contract certificate storage information is realized by forming a block chain of the alliance with a notarization department. Once the contract certificate storing information is written into the block chain, the contract certificate storing information can be automatically synchronized to the notarization data server, each node of the block chain stores the whole amount of electronic contract certificate storing information, and any node can not modify data randomly. When the contract is disputed, the authenticity of the contract can be verified at a public certificate place, and technically, it is ensured that any party involved in the electronic contract cannot falsify the contract.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a signing method of an electronic contract system based on block chain deposit certificate, the signing process of the electronic contract and the preservation of the electronic evidence are on line, and the cost of signing the contract by a user is saved; the electronic contract certificate-storing information sharing system based on the block chain ensures that the certificate-storing information can not be tampered; the certificate storing information not only stores contract information signed by both sides of the user, but also stores all information interaction processes of the user in the contract signing process on the block chain in a chain mode. The process information signed by the contract can be restored to the maximum extent.
In order to realize the purpose, the invention is realized according to the following technical scheme:
a signing method of an electronic contract system based on block chain deposit certificate comprises the following steps:
step S1: a user creates an electronic contract on the electronic contract platform or uploads the existing electronic contract to the electronic contract platform, and then the electronic contract is signed by using an event certificate issued by a CA;
step S2: the electronic contract platform records the information of each key node in the contract signing process of the user and the time point of occurrence of an event and stores the information to the block chain certificate storage platform, wherein the information of the key nodes comprises user identity authentication information and user application certificate information;
step S3: and the notarization part takes out the information from the node of the block chain certificate storage union chain, then decrypts the information by using the key of the user to obtain the specific information signed by the contract, and notarizes the contract of the user.
In the above technical solution, step S1 specifically includes:
step S101: the user registers on the electronic contract platform;
step S102: the user performs identity authentication, including mobile phone short message authentication and online video living body detection authentication;
step S103: a user applies for a CA event certificate;
step S104: the user signs the electronic contract using the CA certificate;
step S105: the electronic contract platform sends the signed electronic contract to the unsigned interested party.
S106, the electronic contract related party repeats the steps from S101 to S104 to sign the electronic contract file;
and S107, the electronic contract platform stores the signed electronic contract in a cloud space, and the user downloads the electronic contract at any time.
In the foregoing technical solution, step S2 specifically includes that the electronic contract platform stores the pipeline information of the key node in the signing process of the user on the electronic contract platform, encrypts the pipeline information using the user key, and finally stores the information to the blockchain through the blockchain node, where the specific pipeline information includes:
user registration: ID. Name, certificate type, user type, certificate number, mobile phone number, mailbox, timestamp;
and (3) user real name authentication: name, certificate number, timestamp;
the user applies for a certificate to the CA: the certificate serial number, the certificate validation time, the expiration time, the certificate type, the start time of applying for the certificate and the success time;
signing by the user: contract number, contract MD5 value (i.e., Message Digest Algorithm 5,), name, certificate information, contract element information, timestamp.
In the above technical solution, in step S3: when the contract signed by the user is disputed, the user submits the original electronic contract to a notarization department of the block chain alliance, the notarization department takes the activity information of the party when signing the contract out from the block chain link points according to the ID submitted by the user, then the activity information is decrypted through a secret key provided by the user to obtain an MD5 value of the contract, the MD5 value is compared with an MD5 value of the original electronic contract, whether the contract is falsified can be determined, meanwhile, specific flow information when the party signs the contract, and the contract signing behavior of the party is confirmed according to the information.
Compared with the prior art, the invention has the following beneficial effects:
1) the electronic contract is signed more conveniently, and the time and the cost of a user are saved.
2) The block chain storage and verification system technically ensures that the electronic contract cannot be tampered
3) Not only the contract can not be tampered, but also the flow information of the contract signing is recorded and stored, and the contract signing behavior of the user can be restored.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow chart of a user signing an electronic contract according to the present invention;
FIG. 2 is a flowchart of the forensics department forensics process of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
A signing method of an electronic contract system based on block chain deposit certificate is characterized by comprising the following steps:
step S1: a user creates an electronic contract on the electronic contract platform or uploads the existing electronic contract to the electronic contract platform, and then the electronic contract is signed by using an event certificate issued by a CA;
step S2: the electronic contract platform records the information of each key node in the contract signing process of the user and the time point of occurrence of an event and stores the information to the block chain certificate storage platform, wherein the information of the key nodes comprises user identity authentication information and user application certificate information;
step S3: and the notarization part takes out the information from the node of the block chain certificate storage union chain, then decrypts the information by using the key of the user to obtain the specific information signed by the contract, and notarizes the contract of the user.
FIG. 1 is a schematic flow chart of a user signing an electronic contract according to the present invention; as shown in fig. 1, step S1 specifically includes:
step S101: the user registers on the electronic contract platform;
the user uses the mobile phone number to register on the platform, the platform sends the verification code to the mobile phone number of the user, the user submits the mobile phone number and the verification code to the platform together, and the platform confirms that the registration is successful after the verification code is correct.
Step S102: the user performs identity authentication, including mobile phone short message authentication and online video living body detection authentication;
the user needs to upload the front and back pictures of the identity card, the electronic contract platform scans the identity card number and the head portrait of the user from the pictures, and then the identity of the user who operates at present is confirmed by comparing the head portrait with the head portrait of the user in the online video.
Step S103: a user applies for a CA event certificate;
and the user submits the name, the identity card number, the mobile phone number and the mailbox to apply for the event certificate to the CA outside the electronic contract platform.
Step S104: the user signs the electronic contract using the CA certificate.
The electronic contract platform calculates the MD5 value of the contract, submits the certificate information of the user to the CA, and the CA encrypts the MD5 value by using the certificate, namely, the signature process of the user on the current electronic contract is realized.
Step S105: the electronic contract platform sends the signed electronic contract to the unsigned interested party.
S106, the electronic contract related party repeats the steps from S101 to S104 to sign the electronic contract file;
and S107, the electronic contract platform stores the signed electronic contract in a cloud space, and the user downloads the electronic contract at any time.
Step S2 includes the electronic contract platform saving the running information of the key node in the signing process of the user on the electronic contract platform, and the specific running information includes:
user registration: ID. Name, certificate type, user type, certificate number, mobile phone number, mailbox, timestamp;
and (3) user real name authentication: name, certificate number, timestamp;
the user applies for a certificate to the CA: the certificate serial number, the certificate validation time, the expiration time, the certificate type, the start time of applying for the certificate and the success time;
signing by the user: contract number, contract MD5 value, name, certificate information, contract element information and timestamp;
and encrypting by using a user key, and finally storing the information into a certificate storage block chain through a block chain link point, wherein all stored original data are encrypted by using an RSA algorithm of 1024 bits, and a contract HASH uses an SHA3 algorithm of 2048 bits.
FIG. 2 is a flowchart of the forensics department forensics process of the present invention. Step S3 of the present invention: when the contract signed by the user is disputed, the user submits the original electronic contract to a notarization department of the block chain alliance, the notarization department takes out the activity information of the party when the contract is signed according to the used ID, then the MD5 value of the contract is obtained through decryption of a secret key provided by the user, the MD5 value of the original electronic contract is compared with the MD 3578 value, whether the contract is falsified or not can be determined, meanwhile, specific pipelining information when the party signs the contract is obtained, due to the fact that the information on the block chain cannot be falsified, the pipelining information can be guaranteed not to be falsified by any person, and the contract signing behavior of the party can be confirmed according to the information.
The following examples are provided for the block chaining verification-based electronic contract signing method of the present invention.
Example 1
This example is used for signing an already electronic contract, the signing process comprising the steps of:
after the user successfully registers and authenticates on the electronic contract platform, the user uploads the existing electronic contract to the electronic contract platform, and the user applies for the event certificate from the CA and uses the certificate to sign through the original electronic contract. The other parties involved in the electronic contract sign the same electronic contract through the same steps. And the electronic contract platform records each operation process information to the block chain. When the contract is disputed, the user submits the original electronic contract to the notarization department, and the notarization department notarizes the original electronic contract.
Example 2
This example is for electronic contract signing generated using an online template, the signing process comprising the steps of:
after the user successfully registers and authenticates on the platform, the user selects the template from the contract template library, modifies the template information, fills in the specific contract content, and applies for the CA certificate to sign the electronic contract. The other parties involved in the electronic contract sign the same electronic contract through the same steps. The electronic contract platform records each operation process information, including contract element information except the template of the contract, to the blockchain. When the contract is disputed, the user submits the original electronic contract to the notarization department, and the notarization department notarizes the original electronic contract.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (2)
1. A signing method of an electronic contract system based on block chain deposit certificate is characterized by comprising the following steps:
step S1: a user creates an electronic contract on the electronic contract platform or uploads the existing electronic contract to the electronic contract platform, and then the electronic contract is signed by using an event certificate issued by a CA;
step S2: the electronic contract platform records the information of each key node in the contract signing process of the user and the time point of occurrence of an event and stores the information to the block chain certificate storage platform, wherein the information of the key nodes comprises user identity authentication information and user application certificate information;
step S3: the notarization part takes out the information from the node of the block chain certificate storage union chain, then decrypts the information by using the key of the user, acquires the specific information signed by the contract and notarizes the contract of the user;
step S2 includes the electronic contract platform saving the flow information of the key node during the signing process of the user on the electronic contract platform, encrypting the flow information with the user key, and saving the flow information to the blockchain through the blockchain node, where the flow information includes:
user registration: ID. Name, certificate type, user type, certificate number, mobile phone number, mailbox, timestamp;
and (3) user real name authentication: name, certificate number, timestamp;
the user applies for a certificate to the CA: the certificate serial number, the certificate validation time, the expiration time, the certificate type, the start time of applying for the certificate and the success time;
signing by the user: contract number, contract MD5 value, name, certificate information, contract element information and timestamp;
in step S3: when the contract signed by the user is disputed, the user submits the original electronic contract to a notarization department of the block chain alliance, the notarization department takes the activity information of the party when signing the contract out from the block chain link points according to the ID submitted by the user, then the activity information is decrypted through a secret key provided by the user to obtain an MD5 value of the contract, the MD5 value is compared with an MD5 value of the original electronic contract, whether the contract is falsified can be determined, meanwhile, specific flow information when the party signs the contract, and the contract signing behavior of the party is confirmed according to the information.
2. The method for signing on the electronic contract system based on the block chaining verification as claimed in claim 1, wherein the step S1 specifically comprises:
step S101: the user registers on the electronic contract platform;
step S102: the user performs identity authentication, including mobile phone short message authentication and online video living body detection authentication;
step S103: a user applies for a CA event certificate;
step S104: the user signs the electronic contract using the CA certificate;
step S105: the electronic contract platform sends the signed electronic contract to the related party without signing;
s106, the electronic contract related party repeats the steps from S101 to S104 to sign the electronic contract file;
and S107, the electronic contract platform stores the signed electronic contract in a cloud space, and the user downloads the electronic contract at any time.
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