CN110990872B - Private key export two-dimensional code storage and scanning recovery method based on block chain - Google Patents
Private key export two-dimensional code storage and scanning recovery method based on block chain Download PDFInfo
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Abstract
The invention discloses a block chain-based two-dimensional code export private key storage and scanning recovery method, which comprises the following steps: creating a private key pair; generating an account ciphertext character string; generating a private key confusion character string; generating a ciphertext confusion character string; generating a mobile phone number ciphertext character string; generating a key token; deriving a secret key two-dimensional code; generating a ciphertext token string; generating a verified mobile phone number character string; reversely decoding the ciphertext token character string and obtaining a mobile phone number ciphertext character string; and obtaining the private key through inverse solution. Through the scheme, the method has the advantages of safety, reliability, simplicity and convenience in operation and the like, and has high practical value and popularization value in the technical field of private key storage and recovery.
Description
Technical Field
The invention relates to the technical field of private key storage and recovery, in particular to a two-dimensional code export and scanning recovery method based on a block chain for private keys.
Background
It is well known that private keys are very important for blockchain projects and digital asset wallets, and can be said to be keys to the blockchain world. While it is now primarily used to control virtual digital assets, it is conceivable that future extensions to the control of various assets, identities (e.g., car keys, digital identities, certificates) are anticipated. If the private keys are lost once, the digital assets and control rights of the private keys are all lost. At the same time, the user cannot ask anyone or organization to help you retrieve their private key (decentralized feature determination). Therefore, if blockchain knowledge and applications are expected to continue to gain popularity, the private key storage and recovery scheme will become the fundamental configuration of the blockchain world.
However, the storage and recovery of the private key of the block chain in the prior art have the following problems:
firstly, a private key direct storage mode:
at present, an existing private key is a string of unordered character strings generated through asymmetric encryption, the unordered character strings can not be set at will like traditional bank passwords, the private key is generated as long as the character strings are directly copied and stored in a computer or mobile equipment, and due to the fact that a plaintext is easy to steal, the digital asset can be exposed to the risk of being stolen after being generally stolen; therefore, the security performance of the direct storage mode is extremely low.
Second, mnemonic to word storage:
at present, some private key mnemonics (another form of private key) are generated by ether houses, and a copy of the mnemonics is backed up in advance, and the backup mode depends on a user. Typically, the user will choose to copy and store in the insurance location, but this solution still faces the risk of a "single point failure", such as loss of paper to record mnemonics, and the like. Since the mnemonic is also another form of the private key, if the mnemonic is revealed, which is equivalent to the private key being revealed, the digital asset is also at risk of theft.
Thirdly, a keystore storage mode:
currently, the market has a separate mainstream public chain such as etherhouse supporting this storage mode, which is an encrypted file of the etherhouse private key. If this document is lost, it means that the user has lost the ability to sign the transaction, meaning that the user's funds are permanently locked into the account.
In summary, the storage technologies in the prior art all have the problems of relative security, storage convenience and migration reliability; therefore, a method for storing, scanning and recovering a private key derived two-dimensional code, which is simple and convenient and has high security performance, needs to be provided.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for storing and scanning and recovering a private key derived two-dimensional code based on a block chain, and the technical solution adopted by the present invention is as follows:
a two-dimensional code storage and scanning recovery method based on private key derivation of a block chain comprises the following steps:
private key two-dimensional code export storage:
generating a pair of public key and private key by adopting an asymmetric encryption algorithm;
generating an account hash character string according to the account name of the user;
generating a UUID character string by adopting a universal unique identification code algorithm;
extracting the first n-bit character number and the last n-bit character number of the UUID character string; n is an integer greater than or equal to 5;
obtaining a confusion character string by combining the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string;
acquiring a digital password preset by a user, and encrypting the digital password and the confusion character string by adopting a symmetric encryption algorithm to generate a ciphertext confusion character string;
encrypting the mobile phone number of the user by adopting a Hash algorithm and generating a mobile phone number ciphertext character string;
combining an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string, and symmetrically encrypting to generate a key token;
generating a corresponding two-dimensional code for the key token and storing the two-dimensional code;
(II) recovering the two-dimensional code encryption private key:
the user verifies the validity of the mobile phone by using the short message, scans the two-dimensional code to read the two-dimensional code information of the private key and generates a ciphertext token character string;
encrypting a mobile phone number corresponding to a mobile phone currently used by a user by adopting a Hash algorithm, and generating a verified mobile phone number character string;
reversely decoding the ciphertext token character string and obtaining a mobile phone number ciphertext character string;
judging whether the mobile phone number ciphertext character string is consistent with the mobile phone number character string; if not, ending the private key recovery;
otherwise, the private key is obtained by inverse solution.
Further, the method comprises the steps of generating a pair of a public key and a private key by adopting an asymmetric encryption algorithm, and creating an account by utilizing a main chain public key and private key rule; the account number includes an account name.
Preferably, the inverse solution to obtain the private key comprises the following steps:
the generated key token is reversely solved to obtain an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string;
the ciphertext confusion character string is reversely solved to obtain a digital password and a confusion character string;
and reversely solving the confusion character string to obtain the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string.
The private key storage and recovery method based on the block chain comprises the following steps:
private key storage:
generating a pair of public key and private key by adopting an asymmetric encryption algorithm;
generating an account hash character string according to the account name of the user;
generating a UUID character string by adopting a universal unique identification code algorithm;
extracting the first n-bit character number and the last n-bit character number of the UUID character string; n is an integer greater than or equal to 5;
obtaining a confusion character string by combining the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string;
acquiring a digital password preset by a user, and encrypting the digital password and the confusion character string by adopting a symmetric encryption algorithm to generate a ciphertext confusion character string;
encrypting the mobile phone number of the user by adopting a Hash algorithm and generating a mobile phone number ciphertext character string;
combining an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string, and symmetrically encrypting to generate a key token;
uploading the key token to a cloud server, and symmetrically encrypting;
(II) private key recovery:
the user verifies the validity of the mobile phone by using the short message and requests the cloud server to obtain a ciphertext token character string corresponding to the user;
encrypting a mobile phone number corresponding to a mobile phone currently used by a user by adopting a Hash algorithm, and generating a verified mobile phone number character string;
reversely decoding the ciphertext token character string and obtaining a mobile phone number ciphertext character string;
judging whether the mobile phone number ciphertext character string is consistent with the mobile phone number character string; if not, ending the private key recovery;
otherwise, the private key is obtained by inverse solution.
Further, the step of requesting the cloud server to obtain the ciphertext token character string corresponding to the user includes the following steps:
a user submits a request for obtaining a ciphertext token string;
and the cloud server queries the corresponding ciphertext token character string according to the user account number.
Further, the method comprises the steps of generating a pair of a public key and a private key by adopting an asymmetric encryption algorithm, and creating an account by utilizing a main chain public key and private key rule; the account number includes an account name.
Preferably, the inverse solution to obtain the private key comprises the following steps:
the generated key token is reversely solved to obtain an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string;
the ciphertext confusion character string is reversely solved to obtain a digital password and a confusion character string;
and reversely solving the confusion character string to obtain the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string.
The two-dimensional code storage method based on private key derivation of the block chain comprises the following steps:
generating a pair of public key and private key by adopting an asymmetric encryption algorithm;
generating an account hash character string according to the account name of the user;
generating a UUID character string by adopting a universal unique identification code algorithm;
extracting the first n-bit character number and the last n-bit character number of the UUID character string; n is an integer greater than or equal to 5;
obtaining a confusion character string by combining the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string;
acquiring a digital password preset by a user, and encrypting the digital password and the confusion character string by adopting a symmetric encryption algorithm to generate a ciphertext confusion character string;
encrypting the mobile phone number of the user by adopting a Hash algorithm and generating a mobile phone number ciphertext character string;
combining an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string, and symmetrically encrypting to generate a key token;
and generating a corresponding two-dimensional code for the key token and storing the two-dimensional code.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention skillfully adopts the block chain to create the account number and generates a set of asymmetric encrypted public key and private key; the invention utilizes the characteristics of block chain decentralized, distributed data storage, point-to-point transmission, consensus mechanism and encryption algorithm, and the situation of theft does not exist as long as the user does not intentionally reveal the private key;
(2) the invention adopts asymmetric encryption to obtain a set of public key and private key, which is more safe and reliable;
(3) according to the method, a token generating mode of remixing combined character strings is adopted, a user private key login token design is constructed, and the decoding difficulty is extremely high; firstly, an account name is encrypted by adopting a Hash algorithm, and a guarantee is provided for subsequent recovery verification; in addition, the method adopts the combination of the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string to obtain the confusion character string, the bit number of the confusion character string can be set according to the requirement, and the deciphering difficulty is increased; moreover, by encrypting the digital password and the confusion character string, a decipherer cannot know the content of the digital password; furthermore, the method adopts a combined encryption mode of the account hash character string, the ciphertext confusion character string and the mobile phone number ciphertext character string to obtain the key token; thus, it is not possible for a hacker to crack the private key.
(4) The method performs combined encryption on the token, the cloud server obtains the key token and performs symmetric encryption, so that the safety of the private key in various scenes is ensured, and the true private key cannot be stolen without a decryption rule even if the ciphertext is stolen;
(5) the encrypted character string is stored in the cloud server after being encrypted by at least one layer, so that even if the server database is attacked, a user takes the multi-layer encrypted character string, and even if a decipherer can decrypt multiple confusion rules, the decipherer can decrypt the multiple confusion rules by using the user wallet password;
(6) the operation of recovering and obtaining the private key is very simple; the method can simplify the recovery verification process while ensuring safety and reliability.
In conclusion, the method has the advantages of safety, reliability, simplicity and convenience in operation and the like, and has high practical value and popularization value in the technical field of private key storage and recovery.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of protection, and it is obvious for those skilled in the art that other related drawings can be obtained according to these drawings without inventive efforts.
Fig. 1 is a flow chart of two-dimensional code encryption and storage according to the present invention.
Fig. 2 is a flowchart of recovering a two-dimensional code ciphertext according to the present invention.
Fig. 3 is a flowchart of the cloud ciphertext recovery process of the present invention.
Detailed Description
To further clarify the objects, technical solutions and advantages of the present application, the present invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1
As shown in fig. 1 to fig. 3, the present embodiment provides a method for storing and scanning and recovering a private key derived two-dimensional code based on a block chain, where in the present embodiment, a user client wallet password needs to be set, and the setting and the determining correctness are conventional technologies, which is not described herein again. In this embodiment, the storage and scan recovery of the private key derived two-dimensional code includes the following steps:
a first part: and (3) exporting and storing the two-dimensional code of the private key:
(11) creating an account number by using a main chain public key and a private key through a block chain wallet, generating a pair of public key and private key by adopting an asymmetric encryption algorithm, and marking the private key as;
(12) and generating an account hash character string A according to the account name of the user.
(13) Generating a UUID character string U by adopting a universal unique identification code algorithm; extracting the first n-bit character number (marked as B1) and the last n-bit character number (marked as B2) of the UUID character string; here, n is defined by the user.
(14) Obtaining a confusion character string B by combining the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string; i.e. B1+ pk + B2; the confusion string B will be different due to the different number of n bits.
(15) And acquiring a digital password (which is a 6-bit password) preset by a user, and encrypting the digital password and the confusion character string by adopting a symmetric encryption algorithm to generate a ciphertext confusion character string BK.
(16) And encrypting the mobile phone number of the user by adopting a Hash algorithm, and generating a mobile phone number ciphertext character string C.
(17) And adopting an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string combination (A + BK + C), and symmetrically encrypting to generate the key token.
(18) And generating a corresponding two-dimensional code for the key token and storing the two-dimensional code.
A second part: recovering the two-dimensional code encryption private key:
(21) the user verifies the validity of the mobile phone by using the short message, scans the two-dimensional code to read the two-dimensional code information of the private key, and generates a ciphertext token string QR;
(22) encrypting a mobile phone number corresponding to a mobile phone currently used by a user by adopting a Hash algorithm, and generating a verified mobile phone number character string C;
(23) reversely decoding the ciphertext token character string and obtaining a mobile phone number ciphertext character string M;
(24) judging whether the mobile phone number ciphertext character string is consistent with the mobile phone number character string;
(241) if not, ending the private key recovery;
(242) otherwise, reversely solving to obtain the private key, comprising the following steps:
(2421) and reversely solving the generated key token to obtain an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string.
(2422) And reversely solving the ciphertext confusion character string to obtain the digital password and the confusion character string.
(2423) And reversely solving the confusion character string to obtain the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string.
In the embodiment, whether the mobile phone is legal or not is verified through the short message, and after the character string of the mobile phone number is judged, a private key is obtained by reversely solving the input user client side wallet password; even if the decipherer can obtain the mobile phone or the two-dimensional code, the final private key cannot be obtained.
Example 2
As shown in fig. 1 to fig. 3, the present embodiment provides a private key storage and recovery method based on a block chain, including the following steps:
first part, private key storage:
(31) creating an account number by using a main chain public key and a private key through a block chain wallet, generating a pair of public key and private key by adopting an asymmetric encryption algorithm, and marking the private key as;
(32) and generating an account hash character string A according to the account name of the user.
(33) Generating a UUID character string U by adopting a universal unique identification code algorithm; extracting the first n-bit character number (marked as B1) and the last n-bit character number (marked as B2) of the UUID character string; here, n is defined by the user.
(34) Obtaining a confusion character string B by combining the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string; i.e. B1+ pk + B2; the confusion string B will be different due to the different number of n bits.
(35) And acquiring a digital password (which is a 6-bit password) preset by a user, and symmetrically encrypting the digital password and the confusion character string to generate a ciphertext confusion character string BK.
(36) And encrypting the mobile phone number of the user by adopting a Hash algorithm, and generating a mobile phone number ciphertext character string C.
(37) And adopting an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string combination (A + BK + C), and symmetrically encrypting to generate the key token.
(38) And uploading the key token to a cloud server, and carrying out symmetric encryption.
Second part, private key recovery:
(41) the user verifies the validity of the mobile phone by using the short message and requests the cloud server to obtain a ciphertext token string QR corresponding to the user; the user requests to obtain the ciphertext token character string request, and the cloud server queries the corresponding ciphertext token character string according to the user account number.
(42) Encrypting a mobile phone number corresponding to a mobile phone currently used by a user by adopting a Hash algorithm, and generating a verified mobile phone number character string C;
(43) reversely decoding the ciphertext token character string and obtaining a mobile phone number ciphertext character string M;
(44) judging whether the mobile phone number ciphertext character string is consistent with the mobile phone number character string;
(441) if not, ending the private key recovery;
(442) otherwise, reversely solving to obtain the private key, comprising the following steps:
(4421) and reversely solving the generated key token to obtain an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string.
(4422) And reversely solving the ciphertext confusion character string to obtain the digital password and the confusion character string.
(4423) And reversely solving the confusion character string to obtain the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string.
In conclusion, the invention fills the technical blank of multiple hybrid combination encryption storage and private key recovery, has outstanding substantive characteristics and obvious progress compared with the prior art, and has very high practical value and popularization value in the technical field of private key storage and recovery.
The above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the scope of the present invention, but all the modifications made by the principles of the present invention and the non-inventive efforts based on the above-mentioned embodiments shall fall within the scope of the present invention.
Claims (8)
1. The two-dimensional code storage and scanning recovery method based on private key derivation of the block chain is characterized by comprising the following steps:
private key two-dimensional code export storage:
generating a pair of public key and private key by adopting an asymmetric encryption algorithm;
generating an account hash character string according to the account name of the user;
generating a UUID character string by adopting a universal unique identification code algorithm;
extracting the first n-bit character number and the last n-bit character number of the UUID character string; n is an integer greater than or equal to 5;
obtaining a confusion character string by combining the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string;
acquiring a digital password preset by a user, and encrypting the digital password and the confusion character string by adopting a symmetric encryption algorithm to generate a ciphertext confusion character string;
encrypting the mobile phone number of the user by adopting a Hash algorithm and generating a mobile phone number ciphertext character string;
combining an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string, and symmetrically encrypting to generate a key token;
generating a corresponding two-dimensional code for the key token and storing the two-dimensional code;
(II) recovering the two-dimensional code encryption private key:
the user verifies the validity of the mobile phone by using the short message, scans the two-dimensional code to read the two-dimensional code information of the private key and generates a ciphertext token character string;
encrypting a mobile phone number corresponding to a mobile phone currently used by a user by adopting a Hash algorithm, and generating a verified mobile phone number character string;
reversely decoding the ciphertext token character string and obtaining a mobile phone number ciphertext character string;
judging whether the mobile phone number ciphertext character string is consistent with the mobile phone number character string; if not, ending the private key recovery;
otherwise, the private key is obtained by inverse solution.
2. The two-dimensional code storage and scanning recovery method based on block chain private key derivation according to claim 1, wherein the generating a pair of public key and private key by using asymmetric encryption algorithm further comprises creating an account number by using a main chain public key and private key rule; the account number includes an account name.
3. The method for storing and scanning recovery of two-dimensional code derived from private key based on block chain according to claim 1, wherein the inverse solution to obtain private key comprises the following steps:
the generated key token is reversely solved to obtain an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string;
the ciphertext confusion character string is reversely solved to obtain a digital password and a confusion character string;
and reversely solving the confusion character string to obtain the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string.
4. The private key storage and recovery method based on the block chain is characterized by comprising the following steps:
private key storage:
generating a pair of public key and private key by adopting an asymmetric encryption algorithm;
generating an account hash character string according to the account name of the user;
generating a UUID character string by adopting a universal unique identification code algorithm;
extracting the first n-bit character number and the last n-bit character number of the UUID character string; n is an integer greater than or equal to 5;
obtaining a confusion character string by combining the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string;
acquiring a digital password preset by a user, and encrypting the digital password and the confusion character string by adopting a symmetric encryption algorithm to generate a ciphertext confusion character string;
encrypting the mobile phone number of the user by adopting a Hash algorithm and generating a mobile phone number ciphertext character string;
combining an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string, and symmetrically encrypting to generate a key token;
uploading the key token to a cloud server, and symmetrically encrypting;
(II) private key recovery:
the user verifies the validity of the mobile phone by using the short message and requests the cloud server to obtain a ciphertext token character string corresponding to the user;
encrypting a mobile phone number corresponding to a mobile phone currently used by a user by adopting a Hash algorithm, and generating a verified mobile phone number character string;
reversely decoding the ciphertext token character string and obtaining a mobile phone number ciphertext character string;
judging whether the mobile phone number ciphertext character string is consistent with the mobile phone number character string; if not, ending the private key recovery;
otherwise, the private key is obtained by inverse solution.
5. The method for storing and recovering the private key based on the block chain according to claim 4, wherein the step of requesting the cloud server to obtain the ciphertext token string corresponding to the user comprises the following steps:
a user submits a request for obtaining a ciphertext token string;
and the cloud server queries the corresponding ciphertext token character string according to the user account number.
6. The blockchain-based private key storage and recovery method according to claim 4, wherein the generating of the pair of the public key and the private key by using the asymmetric encryption algorithm further comprises creating an account number by using a rule of the main chain public key and the private key; the account number includes an account name.
7. The method for storing and recovering the private key based on the blockchain according to claim 4, wherein the inverse solution for obtaining the private key comprises the following steps:
the generated key token is reversely solved to obtain an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string;
the ciphertext confusion character string is reversely solved to obtain a digital password and a confusion character string;
and reversely solving the confusion character string to obtain the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string.
8. The two-dimensional code storage method based on private key derivation of the block chain is characterized by comprising the following steps:
generating a pair of public key and private key by adopting an asymmetric encryption algorithm;
generating an account hash character string according to the account name of the user;
generating a UUID character string by adopting a universal unique identification code algorithm;
extracting the first n-bit character number and the last n-bit character number of the UUID character string; n is an integer greater than or equal to 5;
obtaining a confusion character string by combining the first n-bit character number of the UUID character string, the private key and the last n-bit character number of the UUID character string;
acquiring a digital password preset by a user, and encrypting the digital password and the confusion character string by adopting a symmetric encryption algorithm to generate a ciphertext confusion character string;
encrypting the mobile phone number of the user by adopting a Hash algorithm and generating a mobile phone number ciphertext character string;
combining an account hash character string, a ciphertext confusion character string and a mobile phone number ciphertext character string, and symmetrically encrypting to generate a key token;
and generating a corresponding two-dimensional code for the key token and storing the two-dimensional code.
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