CN113660089B - Tax payment user identity authentication method and device based on blockchain - Google Patents

Tax payment user identity authentication method and device based on blockchain Download PDF

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Publication number
CN113660089B
CN113660089B CN202110798092.2A CN202110798092A CN113660089B CN 113660089 B CN113660089 B CN 113660089B CN 202110798092 A CN202110798092 A CN 202110798092A CN 113660089 B CN113660089 B CN 113660089B
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tax
user terminal
transaction
certificate
blockchain network
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CN113660089A (en
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庞宇雄
郭云志
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Foresee Technology Co ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
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    • H04L9/3263Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements
    • H04L9/3268Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements using certificate validation, registration, distribution or revocation, e.g. certificate revocation list [CRL]
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06QINFORMATION 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
    • G06Q20/00Payment architectures, schemes or protocols
    • G06Q20/38Payment protocols; Details thereof
    • G06Q20/382Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3821Electronic credentials
    • G06Q20/38215Use of certificates or encrypted proofs of transaction rights
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    • G06COMPUTING; CALCULATING OR COUNTING
    • G06QINFORMATION 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
    • G06Q20/00Payment architectures, schemes or protocols
    • G06Q20/38Payment protocols; Details thereof
    • G06Q20/382Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3829Payment protocols; Details thereof insuring higher security of transaction involving key management
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06QINFORMATION 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
    • G06Q40/00Finance; Insurance; Tax strategies; Processing of corporate or income taxes
    • G06Q40/04Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
    • GPHYSICS
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    • G06Q40/00Finance; Insurance; Tax strategies; Processing of corporate or income taxes
    • G06Q40/12Accounting
    • G06Q40/123Tax preparation or submission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/08Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/083Network architectures or network communication protocols for network security for authentication of entities using passwords
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0643Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
    • HELECTRICITY
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    • H04L9/3247Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/50Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees

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Abstract

The invention discloses a tax payment user identity authentication method and device based on a blockchain. The method comprises the following steps: the method comprises the steps of responding to a registration request initiated by a tax-paying user terminal, sending identity information uploaded by the tax-paying user terminal to a blockchain network, and issuing a communication certificate to the tax-paying user terminal through the blockchain network according to the identity information; establishing connection between the tax-paying user terminal and the blockchain network based on the communication certificate, responding to a login request initiated by the tax-paying user terminal through the blockchain network, and issuing an admission certificate to the tax-paying user terminal; responding to a transaction certificate application request initiated by a tax-paying user terminal through a blockchain network, storing ciphertext containing identity information in an expansion domain of the transaction certificate, and issuing the transaction certificate to the tax-paying user terminal; and acquiring the signature transaction sent by the tax-paying user terminal, sending the signature transaction to a blockchain network, and carrying out identity authentication on the tax-paying user terminal through the blockchain network. The invention can improve the safety and reliability of identity authentication.

Description

Tax payment user identity authentication method and device based on blockchain
Technical Field
The invention relates to the technical field of blockchains, in particular to a tax payment user identity authentication method and device based on a blockchain.
Background
With the advent of the information age, people have more activities on the internet, for example, tax users perform operations such as tax inquiry and tax payment through an electronic tax platform, and the precondition of acquiring services through the electronic tax platform is identity authentication. The authentication process of the existing identity authentication method is approximately as follows: the tax-paying user inputs an account number and a password in a user terminal or a webpage and sends a login request to an electronic tax platform; and the electronic tax platform verifies the account number and the password, and responds to the login request when the verification is successful.
The existing identity authentication method is relatively simple, has information leakage risk, is difficult to guarantee the interests of tax users, is a centralized identity authentication method, processes the identity authentication of all tax users accessing the electronic tax platform through the electronic tax platform, increases the processing pressure of the electronic tax platform, and once the electronic tax platform goes offline or fails, the identity authentication of all tax users accessing the electronic tax platform is affected. Therefore, a safe and reliable identity authentication method is needed.
Disclosure of Invention
The invention provides a tax user identity authentication method and device based on a blockchain, which can improve the safety and reliability of identity authentication.
In order to solve the above technical problems, in a first aspect, an embodiment of the present invention provides a blockchain-based tax payment user identity authentication method, including:
responding to a registration request initiated by a tax-paying user terminal, sending identity information uploaded by the tax-paying user terminal to a blockchain network, and issuing a communication certificate to the tax-paying user terminal through the blockchain network according to the identity information;
establishing connection between the tax-paying user terminal and the blockchain network based on the communication certificate, and responding to a login request initiated by the tax-paying user terminal through the blockchain network to issue an admission certificate to the tax-paying user terminal;
responding to a transaction certificate application request initiated by the tax-paying user terminal through a blockchain network, storing ciphertext containing the identity information in an expansion domain of the transaction certificate, and issuing the transaction certificate to the tax-paying user terminal;
acquiring a signature transaction sent by the tax payment user terminal, sending the signature transaction to the blockchain network, and carrying out identity authentication on the tax payment user terminal through the blockchain network; wherein the signed transaction is a transaction signed by a transaction certificate public key/transaction certificate private key.
Further, the issuing of the communication certificate to the tax payment user terminal through the blockchain network according to the identity information specifically includes:
and forwarding the identity information to a CA server through the blockchain network, and issuing the communication certificate generated by the CA server for authorizing the identity information to the tax payment user terminal.
Further, the step of performing identity authentication on the tax payment user terminal through the blockchain network includes:
and when the signed transaction is the transaction signed by the transaction certificate public key, determining the real identity information of the tax-paying user terminal according to the transaction certificate private key corresponding to the transaction certificate public key.
Further, the step of performing identity authentication on the tax payment user terminal through the blockchain network includes:
and when the signature transaction is a transaction signed by the private key of the transaction certificate, decrypting the ciphertext according to the extended domain decryption key to obtain decryption identity information, so as to determine the real identity information of the tax-paying user terminal according to the decryption identity information.
In a second aspect, an embodiment of the present invention provides a blockchain-based tax administration user identity authentication device, including:
the communication certificate issuing module is used for responding to a registration request initiated by the tax-paying user terminal, sending the identity information uploaded by the tax-paying user terminal to a blockchain network, and issuing a communication certificate to the tax-paying user terminal through the blockchain network according to the identity information;
the admission certificate issuing module is used for establishing connection between the tax-paying user terminal and the blockchain network based on the communication certificate, responding to a login request initiated by the tax-paying user terminal through the blockchain network and issuing an admission certificate to the tax-paying user terminal;
the transaction certificate issuing module is used for responding to a transaction certificate application request initiated by the tax-paying user terminal through a blockchain network, storing ciphertext containing the identity information in an expansion domain of the transaction certificate, and issuing the transaction certificate to the tax-paying user terminal;
the user identity authentication module is used for acquiring the signature transaction sent by the tax payment user terminal, sending the signature transaction to the blockchain network, and carrying out identity authentication on the tax payment user terminal through the blockchain network; wherein the signed transaction is a transaction signed by a transaction certificate public key/transaction certificate private key.
Further, the issuing of the communication certificate to the tax payment user terminal through the blockchain network according to the identity information specifically includes:
and forwarding the identity information to a CA server through the blockchain network, and issuing the communication certificate generated by the CA server for authorizing the identity information to the tax payment user terminal.
Further, the step of performing identity authentication on the tax payment user terminal through the blockchain network includes:
and when the signed transaction is the transaction signed by the transaction certificate public key, determining the real identity information of the tax-paying user terminal according to the transaction certificate private key corresponding to the transaction certificate public key.
Further, the step of performing identity authentication on the tax payment user terminal through the blockchain network includes:
and when the signature transaction is a transaction signed by the private key of the transaction certificate, decrypting the ciphertext according to the extended domain decryption key to obtain decryption identity information, so as to determine the real identity information of the tax-paying user terminal according to the decryption identity information.
The embodiment of the invention has the following beneficial effects:
the method comprises the steps of sending identity information uploaded by a tax-paying user terminal to a blockchain network through responding to a registration request initiated by the tax-paying user terminal, sending a communication certificate to the tax-paying user terminal through the blockchain network according to the identity information, establishing connection between the tax-paying user terminal and the blockchain network based on the communication certificate, sending an access certificate to the tax-paying user terminal through the blockchain network in response to a login request initiated by the tax-paying user terminal, storing ciphertext containing the identity information in an expansion domain of the transaction certificate through the blockchain network, sending the transaction certificate to the tax-paying user terminal, obtaining a signature transaction sent by the tax-paying user terminal, sending the signature transaction to the blockchain network, and carrying out identity authentication on the tax-paying user terminal through the blockchain network to realize the identity authentication of the tax-paying user. Compared with the prior art, the embodiment of the invention enables the tax-paying user terminal to access the node of the blockchain network and conduct transaction by means of the transaction certificate through the application of the blockchain network, and stores the ciphertext containing the identity information in the expansion domain of the transaction certificate, so that the identity authentication of the tax-paying user terminal can be performed by utilizing the key technology of the blockchain, and the safety and the reliability of the identity authentication are improved.
Drawings
FIG. 1 is a flow chart of a block chain based tax administration user identity authentication method in a first embodiment of the invention;
FIG. 2 is a data flow diagram of a blockchain-based tax administration user identity authentication method according to an example of the first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a block chain-based tax administration user identity authentication device according to a second embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, the step numbers herein are only for convenience of explanation of the specific embodiments, and are not used as limiting the order of execution of the steps. The method provided in this embodiment may be executed by a relevant server, and the following description will take the server as an execution body as an example.
As shown in fig. 1, a first embodiment provides a blockchain-based tax administration user identity authentication method, which includes steps S1 to S4:
s1, responding to a registration request initiated by a tax-paying user terminal, sending identity information uploaded by the tax-paying user terminal to a blockchain network, and issuing a communication certificate to the tax-paying user terminal through the blockchain network according to the identity information;
s2, establishing connection between the tax-paying user terminal and the blockchain network based on the communication certificate, and issuing an admission certificate to the tax-paying user terminal through the blockchain network in response to a login request initiated by the tax-paying user terminal;
s3, responding to a transaction certificate application request initiated by the tax-paying user terminal through a blockchain network, storing ciphertext containing identity information in an expansion domain of the transaction certificate, and issuing the transaction certificate to the tax-paying user terminal;
s4, acquiring signature transaction sent by the tax-paying user terminal, sending the signature transaction to a blockchain network, and carrying out identity authentication on the tax-paying user terminal through the blockchain network; wherein the signed transaction is a transaction signed by a transaction certificate public key/transaction certificate private key.
As an example, in step S1, in response to a registration request initiated by the tax-paying user terminal, identity information such as an account user name and a password uploaded by the tax-paying user terminal is sent to the blockchain network, and a communication certificate is issued to the tax-paying user terminal through the blockchain network according to the identity information such as the account user name and the password.
In step S2, connection between the tax-paying user terminal and the blockchain network is established based on the communication certificate, so that the tax-paying user terminal can initiate a login request to the blockchain network, when the tax-paying user terminal initiates the login request to the blockchain network, an access certificate is issued to the tax-paying user terminal through the blockchain network in response to the login request, and at the moment, the tax-paying user finishes registration and login, and the tax-paying user has the right to use the blockchain network and the identity certificate in the blockchain network.
In step S3, when the tax-paying user terminal cannot obtain the corresponding transaction certificate from the local database according to the transaction to be executed, a transaction certificate application request may be initiated to the blockchain network, the transaction certificate is obtained through the blockchain network, and the ciphertext including the identity information such as the account user name and the password is stored in the expansion domain of the transaction certificate, so as to issue the transaction certificate to the tax-paying user terminal.
In step S4, the tax-paying user terminal may select a corresponding transaction certificate to sign a transaction to be executed, obtain a signed transaction, respond to a transaction execution request initiated by the tax-paying user terminal, obtain a signed transaction sent by the tax-paying user terminal, and send the signed transaction to the blockchain network, and perform identity authentication on the tax-paying user terminal through the blockchain network, that is, perform identity authentication by using a certificate key, thereby implementing the identity authentication of the tax-paying user.
According to the embodiment, the blockchain network is applied, so that the tax-paying user terminal can access to the nodes of the blockchain network and conduct transaction by means of the transaction certificate, and the ciphertext containing the identity information is stored in the expansion domain of the transaction certificate, so that the identity authentication can be conducted on the tax-paying user terminal by utilizing the key technology of the blockchain, and the safety and reliability of the identity authentication are improved.
In a preferred embodiment, the issuing, by the blockchain network, a communication certificate to the tax-paying user terminal according to the identity information is specifically: and forwarding the identity information to the CA server through the blockchain network, and issuing a communication certificate generated by authorizing the identity information by the CA server to the tax payment user terminal.
As an example, the blockchain network is connected with a CA server, and identity information such as account user names and passwords is forwarded to the CA server through the blockchain network, so that the CA server authorizes the identity information such as account user names and passwords to generate a communication certificate, receives the communication certificate issued by the CA server, and forwards the communication certificate to the tax-paying user terminal.
According to the embodiment, the blockchain network is connected with the CA server, and the CA server is utilized to authorize the communication certificate, so that the blockchain network and the tax administration user terminal can communicate with each other in a standard transmission protocol, and the safety and reliability of data transmission are effectively ensured.
In a preferred embodiment, the identity authentication of the tax administration user terminal through the blockchain network includes: when the signed transaction is a transaction signed by the public key of the transaction certificate, determining the real identity information of the tax-paying user terminal according to the private key of the transaction certificate corresponding to the public key of the transaction certificate.
As an example, when the signature transaction is a transaction signed by a transaction certificate public key, a transaction certificate private key corresponding to the transaction certificate public key is selected through the blockchain network to receive the signature transaction, if the receiving is successful, the true identity information of the tax administration user terminal is determined to be the tax administration user terminal holding the transaction certificate, and if the receiving is failed, the true identity information of the tax administration user terminal is not determined to be the tax administration user terminal holding the transaction certificate.
In a preferred embodiment, the identity authentication of the tax administration user terminal through the blockchain network includes: and when the signature transaction is a transaction signed by the private key of the transaction certificate, decrypting the ciphertext according to the extended domain decryption key to obtain decryption identity information, so as to determine the real identity information of the tax-paying user terminal according to the decryption identity information.
As an example, when the signature transaction is a transaction signed by a private key of a transaction certificate, the general node through the blockchain network cannot perform identity authentication by using the certificate key, and can only acquire an extended domain decryption key through the supervision node, and decrypt the ciphertext according to the extended domain decryption key to obtain decryption identity information, so as to determine the real identity information of the tax-paying user terminal according to the decrypted identity information such as the account user name, the password and the like.
According to the embodiment, the tax-paying user terminal can access to the nodes of the blockchain network and conduct transaction by means of the transaction certificate through the application of the blockchain network, when the signed transaction is a transaction signed by the public key of the transaction certificate, identity authentication can be conducted by means of the certificate key, and when the signed transaction is a transaction signed by the private key of the transaction certificate, identity authentication can be conducted by means of the extended domain decryption key, namely, the identity authentication is conducted on the tax-paying user terminal by means of the key technology of the blockchain, so that the safety and reliability of the identity authentication are improved.
As shown in fig. 2, as an exemplary implementation procedure of the blockchain-based tax administration user identity authentication method, the specific implementation procedure is as follows:
1. tax real name login:
aiming at the tax-paying user without real-name authentication, according to the identity information of the account user name and the password input on the tax-paying user terminal, the real-name setting of the account user name and the password is completed;
after the tax user completes real name setting, relevant identity information is transmitted to a blockchain network, the blockchain network is connected with a CA server, and the government end authorizes the electronic digital certificate through the CA server.
2. Blockchain real name identity authentication:
confirming the privacy authority owned by the tax-paying user, and encrypting information from the tax-paying user terminal to the server in the sending process; the application flow of the admission certificate is as follows:
step 1, each node imports the effective identity of the corresponding tax-paying user into a CA server, and the CA server verifies the effective identity;
step 2, if the CA server successfully verifies the account, creating an account for the node and returning a success result;
step 3, the tax-paying user is connected with the tax-paying user terminal to request to log in the blockchain network, and a user name and a password registered in the offline stage are sent to the tax-paying user terminal;
step 4, the tax payment user terminal sends a login request to the PKI framework on behalf of the tax payment user;
step 5. Receiving a return package from the CA server, wherein the return package contains a plurality of certificates corresponding to private keys generated by the tax administration user terminal, and once the tax administration user terminal verifies that all the encrypted materials in the return package are valid, the return package stores the certificates locally and informs the tax administration user, and the tax administration user finishes registration login at the moment, and the tax administration user has the use right of the blockchain network and the identity certificate of the blockchain network.
3. Application of short-term certificate transaction certificates:
the short-term certificate transaction certificate Tcert application flow is as follows:
step 1, the tax-paying user terminal extracts a corresponding transaction certificate Tcert from a local database according to a transaction to be executed;
step 2, if the corresponding transaction certificate Tcert is not extracted, sending corresponding materials and requests to a PKI framework, namely submitting an identity certificate and a user name request of the tax-paying user to regenerate the transaction certificate Tcert;
step 3, receiving a return package from the CA server, wherein the return package contains a plurality of certificates corresponding to private keys generated by the tax-paying user terminal, and once the tax-paying user terminal verifies that all encryption materials in the return package are valid, the certificates are stored locally;
step 4, corresponding chain code deployment or execution is carried out according to the specific request content.
4. Generation of certificate public Key (tcertpub_key):
the generation flow of the certificate public Key (tcertpub_key) is as follows:
step 1.TCA generates its own root Key tca_kdf_key using a Key distribution function, and generates a derivative Key df_key using a public Key enrolpub_key in an admission certificate echt, key df_key=hmac (TC a_kdf_key, enrolpub_key);
step 2.Tc generates an extended Key ExpansionKey, expansionKey =hmac (keydf_key, "2") using a derivative Key keydf_key;
step 3.Tca generates an extension Value, expansion value=hmac (ExpansionKey, tcertlndex) by using Key DF_Key and Tcertlndex, wherein Tcertlndex is the Value of a counter, and 2 is added to the Value of the counter every time a certificate is generated;
step 4.Tca generates a transaction certificate tcertpub_key using an ExpansionValue and an admission certificate public Key enrolpub Key, tcertpub_key=enrolpub_key+expansionvalue G;
the TCA sends the transaction certificate Tcerts and the TCA_KDF_Key which are generated in batches to a tax-paying user through a secure channel (TLS), and the tax-paying user recovers the transaction certificate Tcerts private Key by using the TCA.
5. Generation of certificate extension domain (extension):
TCA calculates ciphertext information of Tcertlndex and enrollmentID and stores an extended domain part of the transaction certificate; the specific flow of the generation of the expansion domain is as follows:
step 1.Tca generates an encryption Key tcertowner_ EncryptKey, TCertOwner _encryptekey=hmac (keydf_key, "1") of the encryption Tcertlndex using the keydf_key;
step 2.Tca generates ciphertext encTcertlndex of Tcertlndex, encrypttcertowner_enciyptkey (TcertIndex constant);
step 3.Tca calculates encryption key enrollmentIDKey, enrollmentIDKey =hmac (pre_k, tcertID) from Prek and transaction certificate sequence number TcertID;
step 4.Tca calculates ciphertext of enrollmentID, encenrollmentld= EncryptenroiimentiDKey (enrollnientlD).
Step 4 and step 5 are transaction certificate Tcert public key and transaction certificate Tcert expansion domain generated for tax-paying user when TCA receives transaction certificate application request of tax-paying user, and the two are main contents of transaction certificate.
6. Generation of private Key (tcertpriv_key):
after receiving a transaction certificate Tcert and a TCA_KDF_Key transmitted by a TCA, a tax-paying user generates a signature private Key TcertPriv_Key corresponding to the transaction certificate Tcert; the private key generation flow is as follows:
step 1, calculating an encryption Key TCertOwner EncryptKey, TCertOwner _encryptekey=hmac (keydf_key, "1") of Tcertlndex by using the keydf_key;
step 2, decrypting the encTcertlndex read from the extension domain part of the transaction certificate by using the TCertOwner_encrypteKey to obtain Tcertlndex;
step 3, generating an expansion Key ExpansionKey, expansionKey =hmac (keydf_key, "2") using the KeyDF Key;
step 4, generating an Expansion Value ExpansionValue by using an ExpansionKey and a Tcertlndex, wherein the Expansion value=HMAC (ExpansionKey, tcertlndex);
step 5, generating a signature private Key TcertPriv_Key by using the ExpansionValue and the admission certificate private Key EnrolPrivateKey, wherein TcertPriv Key=EnrolPrivateKey+ExpansionValue.
7. And (3) realizing no relevance:
selecting different Tcerts to sign different transactions;
for the sender of the transaction, different transaction certificates Tcert can be selected to sign different transactions, so that no relevance of the transactions can be realized, and for the receiver of the transactions, the public key of the access certificate or the public key of the transaction certificate can be selected to be used for receiving, and the anonymity and anonymity of the transactions are realized.
8. Anonymization implementation:
anonymity is achieved when the transactor does not need to know the identity of the user;
when the trader does not need to know the identity of the tax-paying user, the tax-paying user signs the trade using the private signature key of the trade certificate Tcert, in which case the general nodes on the blockchain network are unable to determine the identity of the trader.
9. Tax administration can be realized:
the supervisor is required to realize the knowledge of the true identities of all Tcerts according to tax administration;
the supervisor has the right and also the ability to know the true identities of all transaction certificates Tcert, and there are two ways to trace back the identity of the transactor, where the supervisor can decrypt the encEnrollmentID > of the transaction certificate extension domain part by obtaining the encryption key Prek to trace back the true identity of the transactor, the tracing flow is as follows:
step 1, if the supervisor acquires the Prek, a symmetric encryption key curollmentidkey=hmac (Prek, tcertID) of the encrypted curollmentid can be calculated according to the serial number of the transaction certificate Tcert;
step 2. The supervisor calculates Decrypt (enrollmentIDKey, enrollmentID), i.e. decrypts the enrollmentID, and can trace back the true identity of the transaction certificate Tcert.
As shown in fig. 3, a second embodiment provides a blockchain-based tax administration user identity authentication device, including: the communication certificate issuing module 21 is configured to respond to a registration request initiated by the tax-paying user terminal, send identity information uploaded by the tax-paying user terminal to the blockchain network, and issue a communication certificate to the tax-paying user terminal through the blockchain network according to the identity information; the admission certificate issuing module 22 is configured to establish connection between the tax-paying user terminal and the blockchain network based on the communication certificate, and issue an admission certificate to the tax-paying user terminal through the blockchain network in response to a login request initiated by the tax-paying user terminal; the transaction certificate issuing module 23 is configured to respond to a transaction certificate application request initiated by the tax-paying user terminal through the blockchain network, store a ciphertext including identity information in an extended domain of the transaction certificate, and issue the transaction certificate to the tax-paying user terminal; the user identity authentication module 24 is configured to obtain a signature transaction sent by the tax-paying user terminal, send the signature transaction to the blockchain network, and perform identity authentication on the tax-paying user terminal through the blockchain network; wherein the signed transaction is a transaction signed by a transaction certificate public key/transaction certificate private key.
Illustratively, the communication certificate issuing module 21 is used for responding to the registration request initiated by the tax-paying user terminal, sending the identity information such as the account user name and the password uploaded by the tax-paying user terminal to the blockchain network, and issuing the communication certificate to the tax-paying user terminal through the blockchain network according to the identity information such as the account user name and the password.
The access certificate issuing module 22 establishes connection between the tax-paying user terminal and the blockchain network based on the communication certificate, so that the tax-paying user terminal can initiate a login request to the blockchain network, and when the tax-paying user terminal initiates the login request to the blockchain network, the access certificate is issued to the tax-paying user terminal through the blockchain network in response to the login request, and at the moment, the tax-paying user finishes registration and login, and the tax-paying user has the use right of the blockchain network and the identity certificate of the blockchain network.
Through the transaction certificate issuing module 23, when the tax-paying user terminal cannot acquire the corresponding transaction certificate from the local database according to the transaction to be executed, a transaction certificate application request can be initiated to the blockchain network, the transaction certificate is acquired through the blockchain network, the ciphertext containing identity information such as account user name, password and the like is stored in the expansion domain of the transaction certificate, and the transaction certificate is issued to the tax-paying user terminal.
Through the user identity authentication module 24, the tax-paying user terminal can select a corresponding transaction certificate to sign a transaction to be executed, obtain a signed transaction, respond to a transaction execution request initiated by the tax-paying user terminal, obtain the signed transaction sent by the tax-paying user terminal, send the signed transaction to the blockchain network, and perform identity authentication on the tax-paying user terminal through the blockchain network, namely perform identity authentication by using a certificate key, thereby realizing the identity authentication of the tax-paying user.
According to the embodiment, the blockchain network is applied, so that the tax-paying user terminal can access to the nodes of the blockchain network and conduct transaction by means of the transaction certificate, and the ciphertext containing the identity information is stored in the expansion domain of the transaction certificate, so that the identity authentication can be conducted on the tax-paying user terminal by utilizing the key technology of the blockchain, and the safety and reliability of the identity authentication are improved.
In a preferred embodiment, the issuing, by the blockchain network, a communication certificate to the tax-paying user terminal according to the identity information is specifically: and forwarding the identity information to the CA server through the blockchain network, and issuing a communication certificate generated by authorizing the identity information by the CA server to the tax payment user terminal.
As an example, the blockchain network is connected with a CA server, and identity information such as account user names and passwords is forwarded to the CA server through the blockchain network, so that the CA server authorizes the identity information such as account user names and passwords to generate a communication certificate, receives the communication certificate issued by the CA server, and forwards the communication certificate to the tax-paying user terminal.
According to the embodiment, the blockchain network is connected with the CA server, and the CA server is utilized to authorize the communication certificate, so that the blockchain network and the tax administration user terminal can communicate with each other in a standard transmission protocol, and the safety and reliability of data transmission are effectively ensured.
According to the embodiment, the tax-paying user terminal can access to the nodes of the blockchain network and conduct transaction by means of the transaction certificate through the application of the blockchain network, when the signed transaction is a transaction signed by the public key of the transaction certificate, identity authentication can be conducted by means of the certificate key, and when the signed transaction is a transaction signed by the private key of the transaction certificate, identity authentication can be conducted by means of the extended domain decryption key, namely, the identity authentication is conducted on the tax-paying user terminal by means of the key technology of the blockchain, so that the safety and reliability of the identity authentication are improved.
As an example, the block chain-based tax payment user identity authentication device is applied, and the specific implementation process is as follows:
1. tax real name login:
aiming at the tax-paying user without real-name authentication, according to the identity information of the account user name and the password input on the tax-paying user terminal, the real-name setting of the account user name and the password is completed;
after the tax user completes real name setting, relevant identity information is transmitted to a blockchain network, the blockchain network is connected with a CA server, and the government end authorizes the electronic digital certificate through the CA server.
2. Blockchain real name identity authentication:
confirming the privacy authority owned by the tax-paying user, and encrypting information from the tax-paying user terminal to the server in the sending process; the application flow of the admission certificate is as follows:
step 1, each node imports the effective identity of the corresponding tax-paying user into a CA server, and the CA server verifies the effective identity;
step 2, if the CA server successfully verifies the account, creating an account for the node and returning a success result;
step 3, the tax-paying user is connected with the tax-paying user terminal to request to log in the blockchain network, and a user name and a password registered in the offline stage are sent to the tax-paying user terminal;
step 4, the tax payment user terminal sends a login request to the PKI framework on behalf of the tax payment user;
step 5. Receiving a return package from the CA server, wherein the return package contains a plurality of certificates corresponding to private keys generated by the tax administration user terminal, and once the tax administration user terminal verifies that all the encrypted materials in the return package are valid, the return package stores the certificates locally and informs the tax administration user, and the tax administration user finishes registration login at the moment, and the tax administration user has the use right of the blockchain network and the identity certificate of the blockchain network.
3. Application of short-term certificate transaction certificates:
the short-term certificate transaction certificate Tcert application flow is as follows:
step 1, the tax-paying user terminal extracts a corresponding transaction certificate Tcert from a local database according to a transaction to be executed;
step 2, if the corresponding transaction certificate Tcert is not extracted, sending corresponding materials and requests to a PKI framework, namely submitting an identity certificate and a user name request of the tax-paying user to regenerate the transaction certificate Tcert;
step 3, receiving a return package from the CA server, wherein the return package contains a plurality of certificates corresponding to private keys generated by the tax-paying user terminal, and once the tax-paying user terminal verifies that all encryption materials in the return package are valid, the certificates are stored locally;
step 4, corresponding chain code deployment or execution is carried out according to the specific request content.
4. Generation of certificate public Key (tcertpub_key):
the generation flow of the certificate public Key (tcertpub_key) is as follows:
step 1.TCA generates its own root Key tca_kdf_key using a Key distribution function, and generates a derivative Key df_key using a public Key enrolpub_key in an admission certificate echt, key df_key=hmac (TC a_kdf_key, enrolpub_key);
step 2.Tc generates an extended Key ExpansionKey, expansionKey =hmac (keydf_key, "2") using a derivative Key keydf_key;
step 3.Tca generates an extension Value, expansion value=hmac (ExpansionKey, tcertlndex) by using Key DF_Key and Tcertlndex, wherein Tcertlndex is the Value of a counter, and 2 is added to the Value of the counter every time a certificate is generated;
step 4.Tca generates a transaction certificate tcertpub_key using an ExpansionValue and an admission certificate public Key enrolpub Key, tcertpub_key=enrolpub_key+expansionvalue G;
the TCA sends the transaction certificate Tcerts and the TCA_KDF_Key which are generated in batches to a tax-paying user through a secure channel (TLS), and the tax-paying user recovers the transaction certificate Tcerts private Key by using the TCA.
5. Generation of certificate extension domain (extension):
TCA calculates ciphertext information of Tcertlndex and enrollmentID and stores an extended domain part of the transaction certificate; the specific flow of the generation of the expansion domain is as follows:
step 1.Tca generates an encryption Key tcertowner_ EncryptKey, TCertOwner _encryptekey=hmac (keydf_key, "1") of the encryption Tcertlndex using the keydf_key;
step 2.Tca generates ciphertext encTcertlndex of Tcertlndex, encrypttcertowner_enciyptkey (TcertIndex constant);
step 3.Tca calculates encryption key enrollmentIDKey, enrollmentIDKey =hmac (pre_k, tcertID) from Prek and transaction certificate sequence number TcertID;
step 4.Tca calculates ciphertext of enrollmentID, encenrollmentld= EncryptenroiimentiDKey (enrollnientlD).
Step 4 and step 5 are transaction certificate Tcert public key and transaction certificate Tcert expansion domain generated for tax-paying user when TCA receives transaction certificate application request of tax-paying user, and the two are main contents of transaction certificate.
6. Generation of private Key (tcertpriv_key):
after receiving a transaction certificate Tcert and a TCA_KDF_Key transmitted by a TCA, a tax-paying user generates a signature private Key TcertPriv_Key corresponding to the transaction certificate Tcert; the private key generation flow is as follows:
step 1, calculating an encryption Key TCertOwner EncryptKey, TCertOwner _encryptekey=hmac (keydf_key, "1") of Tcertlndex by using the keydf_key;
step 2, decrypting the encTcertlndex read from the extension domain part of the transaction certificate by using the TCertOwner_encrypteKey to obtain Tcertlndex;
step 3, generating an expansion Key ExpansionKey, expansionKey =hmac (keydf_key, "2") using the KeyDF Key;
step 4, generating an Expansion Value ExpansionValue by using an ExpansionKey and a Tcertlndex, wherein the Expansion value=HMAC (ExpansionKey, tcertlndex);
step 5, generating a signature private Key TcertPriv_Key by using the ExpansionValue and the admission certificate private Key EnrolPrivateKey, wherein TcertPriv Key=EnrolPrivateKey+ExpansionValue.
7. And (3) realizing no relevance:
selecting different Tcerts to sign different transactions;
for the sender of the transaction, different transaction certificates Tcert can be selected to sign different transactions, so that no relevance of the transactions can be realized, and for the receiver of the transactions, the public key of the access certificate or the public key of the transaction certificate can be selected to be used for receiving, and the anonymity and anonymity of the transactions are realized.
8. Anonymization implementation:
anonymity is achieved when the transactor does not need to know the identity of the user;
when the trader does not need to know the identity of the tax-paying user, the tax-paying user signs the trade using the private signature key of the trade certificate Tcert, in which case the general nodes on the blockchain network are unable to determine the identity of the trader.
9. Tax administration can be realized:
the supervisor is required to realize the knowledge of the true identities of all Tcerts according to tax administration;
the supervisor has the right and also the ability to know the true identities of all transaction certificates Tcert, and there are two ways to trace back the identity of the transactor, where the supervisor can decrypt the encEnrollmentID > of the transaction certificate extension domain part by obtaining the encryption key Prek to trace back the true identity of the transactor, the tracing flow is as follows:
step 1, if the supervisor acquires the Prek, a symmetric encryption key curollmentidkey=hmac (Prek, tcertID) of the encrypted curollmentid can be calculated according to the serial number of the transaction certificate Tcert;
step 2. The supervisor calculates Decrypt (enrollmentIDKey, enrollmentID), i.e. decrypts the enrollmentID, and can trace back the true identity of the transaction certificate Tcert.
In summary, the embodiment of the invention has the following beneficial effects:
the method comprises the steps of sending identity information uploaded by a tax-paying user terminal to a blockchain network through responding to a registration request initiated by the tax-paying user terminal, sending a communication certificate to the tax-paying user terminal through the blockchain network according to the identity information, establishing connection between the tax-paying user terminal and the blockchain network based on the communication certificate, sending an access certificate to the tax-paying user terminal through the blockchain network in response to a login request initiated by the tax-paying user terminal, storing ciphertext containing the identity information in an expansion domain of the transaction certificate through the blockchain network, sending the transaction certificate to the tax-paying user terminal, obtaining a signature transaction sent by the tax-paying user terminal, sending the signature transaction to the blockchain network, and carrying out identity authentication on the tax-paying user terminal through the blockchain network to realize the identity authentication of the tax-paying user. According to the embodiment of the invention, the tax-paying user terminal can access the node of the blockchain network and conduct transaction by means of the transaction certificate by applying the blockchain network, and the ciphertext containing the identity information is stored in the expansion domain of the transaction certificate, so that the identity authentication of the tax-paying user terminal can be conducted by utilizing the key technology of the blockchain, and the safety and reliability of the identity authentication are improved.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Those skilled in the art will appreciate that implementing all or part of the above-described embodiments may be accomplished by way of computer programs, which may be stored on a computer readable storage medium, which when executed may comprise the steps of the above-described embodiments. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), or the like.

Claims (4)

1. A tax payment user identity authentication method based on a block chain is characterized by comprising the following steps:
responding to a registration request initiated by a tax-paying user terminal, sending identity information uploaded by the tax-paying user terminal to a blockchain network, and issuing a communication certificate to the tax-paying user terminal through the blockchain network according to the identity information;
establishing connection between the tax-paying user terminal and the blockchain network based on the communication certificate, and responding to a login request initiated by the tax-paying user terminal through the blockchain network to issue an admission certificate to the tax-paying user terminal;
responding to a transaction certificate application request initiated by the tax-paying user terminal through a blockchain network, storing ciphertext containing the identity information in an expansion domain of the transaction certificate, and issuing the transaction certificate to the tax-paying user terminal;
acquiring a signature transaction sent by the tax payment user terminal, sending the signature transaction to the blockchain network, and carrying out identity authentication on the tax payment user terminal through the blockchain network; wherein, the signature transaction is a transaction signed by a transaction certificate public key/transaction certificate private key, and specifically comprises the following steps:
when the signature transaction is a transaction signed by the transaction certificate public key, determining the real identity information of the tax-paying user terminal according to a transaction certificate private key corresponding to the transaction certificate public key;
and when the signature transaction is a transaction signed by the private key of the transaction certificate, decrypting the ciphertext according to the extended domain decryption key to obtain decryption identity information, so as to determine the real identity information of the tax-paying user terminal according to the decryption identity information.
2. The blockchain-based tax payment user identity authentication method according to claim 1, wherein the issuing of the communication certificate to the tax payment user terminal through the blockchain network according to the identity information specifically comprises:
and forwarding the identity information to a CA server through the blockchain network, and issuing the communication certificate generated by the CA server for authorizing the identity information to the tax payment user terminal.
3. A blockchain-based tax administration user identity authentication device, comprising:
the communication certificate issuing module is used for responding to a registration request initiated by the tax-paying user terminal, sending the identity information uploaded by the tax-paying user terminal to a blockchain network, and issuing a communication certificate to the tax-paying user terminal through the blockchain network according to the identity information;
the admission certificate issuing module is used for establishing connection between the tax-paying user terminal and the blockchain network based on the communication certificate, responding to a login request initiated by the tax-paying user terminal through the blockchain network and issuing an admission certificate to the tax-paying user terminal;
the transaction certificate issuing module is used for responding to a transaction certificate application request initiated by the tax-paying user terminal through a blockchain network, storing ciphertext containing the identity information in an expansion domain of the transaction certificate, and issuing the transaction certificate to the tax-paying user terminal;
the user identity authentication module is used for acquiring the signature transaction sent by the tax payment user terminal, sending the signature transaction to the blockchain network, and carrying out identity authentication on the tax payment user terminal through the blockchain network; wherein, the signature transaction is a transaction signed by a transaction certificate public key/transaction certificate private key, and specifically comprises the following steps:
when the signature transaction is a transaction signed by the transaction certificate public key, determining the real identity information of the tax-paying user terminal according to a transaction certificate private key corresponding to the transaction certificate public key;
and when the signature transaction is a transaction signed by the private key of the transaction certificate, decrypting the ciphertext according to the extended domain decryption key to obtain decryption identity information, so as to determine the real identity information of the tax-paying user terminal according to the decryption identity information.
4. The blockchain-based tax payment user identity authentication device of claim 3, wherein the issuing of the communication certificate to the tax payment user terminal through the blockchain network according to the identity information specifically comprises:
and forwarding the identity information to a CA server through the blockchain network, and issuing the communication certificate generated by the CA server for authorizing the identity information to the tax payment user terminal.
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