CN108564353B - Payment system and method based on block chain - Google Patents

Payment system and method based on block chain Download PDF

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CN108564353B
CN108564353B CN201810390212.3A CN201810390212A CN108564353B CN 108564353 B CN108564353 B CN 108564353B CN 201810390212 A CN201810390212 A CN 201810390212A CN 108564353 B CN108564353 B CN 108564353B
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preset
data
payer
payment
private key
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CN108564353A (en
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李�杰
张宇
周海京
张哲�
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Shuzi Qianbao Beijing Technology Co ltd
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Shuzi Qianbao Beijing Technology Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/04—Payment circuits
    • G06Q20/06—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme
    • G06Q20/065—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme using e-cash
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/36—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3823—Payment protocols; Details thereof insuring higher security of transaction combining multiple encryption tools for a transaction
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
    • G06Q20/401—Transaction verification
    • G06Q20/4014—Identity check for transactions
    • G06Q20/40145—Biometric identity checks

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  • Engineering & Computer Science (AREA)
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  • General Business, Economics & Management (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)

Abstract

The invention provides a payment system and a method based on a block chain, which relate to the technical field of payment and comprise the following steps: the system comprises a payee payment terminal, a face recognition server, a block chain node and a cloud storage system, wherein the payee payment terminal carries out attribute encryption on transaction information and face data sent by face recognition equipment, a first data ciphertext is sent to the face recognition server through a gateway, the face recognition server decrypts the transaction information and the face data to obtain the face data and a payer wallet address, a private key corresponding to the payer wallet address and preset face data are obtained from the cloud storage system, if the face data and the preset face data meet preset recognition conditions, the private key is called to sign the transaction, the transaction information after attribute encryption is broadcasted into the system, the block chain node decrypts and verifies the transaction information, and if the transaction information is recorded in a block chain. The payment system based on the block chain introduces face brushing payment and encrypts transaction information, so that diversified payment requirements and safety requirements can be met.

Description

Payment system and method based on block chain
Technical Field
The invention relates to the technical field of transaction payment, in particular to a payment system and method based on a block chain.
Background
At present, when a user uses a payment system realized based on a block chain technology in the prior art to perform transaction payment, the user usually needs to complete a digital signature of a transaction by means of a hardware device (such as a mobile phone) storing a private key of the user, and the payment mode is single, so that diversified payment requirements of the user cannot be met. In addition, most of the existing payment technologies lack protection on transaction information, so that privacy of users is easily revealed, and inconvenience is brought to the users.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a payment system and method based on a block chain, so as to alleviate the technical problems that in the existing payment process, a user usually needs to complete a digital signature on a transaction by using a hardware device storing a private key of the user, the payment method is single, the transaction information is not protected, diversified payment requirements and security requirements of the user cannot be met, inconvenience is brought to the user, and the like.
In a first aspect, an embodiment of the present invention provides a payment system based on a blockchain, including: the system comprises a payee payment terminal, face recognition equipment, a gateway, a face recognition server, block chain nodes and a cloud storage system;
the payee payment terminal is used for organizing transaction information, receiving the face data collected by the face recognition device, carrying out attribute encryption on the transaction information and the face data according to a specified access control rule, and sending a first data ciphertext obtained by encryption to the gateway so that the gateway sends the first data ciphertext to the face recognition server;
the face recognition server is used for carrying out decryption according to a preset attribute password private key corresponding to the face recognition server, acquiring face data and a payer wallet address in transaction information from a first data plain text obtained by decryption, and acquiring a private key corresponding to the payer wallet address and preset face data from the cloud storage system; if the face data and the preset face data meet the preset identification condition, calling the private key to sign the transaction information, and broadcasting the encrypted and signed transaction information to the system after performing attribute encryption;
and the block chain node is used for decrypting the encrypted and signed transaction information according to the preset attribute password private key corresponding to the block chain node, verifying the decrypted transaction information by using the digital identity certificate associated with the private key, and recording the transaction information which passes the verification in the block chain network if the verification passes.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the method further includes: a payer payment terminal, a central digital currency system and a CA system;
the payer payment terminal is used for generating a public and private key pair and a payer wallet address according to the user information of the payment user; when the user determines to open face-brushing payment, the attribute encryption method is used for carrying out attribute encryption on the face data and the private key which are acquired by the face recognition equipment corresponding to the user according to a specified access control rule, and sending an obtained data ciphertext (including a payer wallet address, the private key subjected to attribute encryption and preset face data) to the gateway so that the gateway sends the data ciphertext to the cloud storage system;
the central digital currency system is used for generating a digital currency account corresponding to the payer wallet address according to a registration request containing the payer wallet address and sent by the payer payment terminal;
the CA system is also used for generating an identity digital certificate according to the wallet address of the payer sent by the payment terminal, transmitting the identity digital certificate associated with the wallet address of the payer to the payment terminal of the payer through the gateway and adding the identity digital certificate into the blockchain network; and distributing the preset attribute password private keys corresponding to the face recognition server and the block chain link points.
In a second aspect, an embodiment of the present invention further provides a payment method based on a block chain, which is applied to a face recognition server, and includes:
decrypting a first data ciphertext received from the gateway according to a preset attribute password private key corresponding to the gateway;
acquiring the face data and the wallet address of the payer in the transaction information from the decrypted first data plain text;
acquiring a private key and preset face data corresponding to the wallet address of the payer from a cloud storage system;
if the face data and the preset face data meet the preset identification condition, calling the private key to sign the transaction information, and broadcasting the encrypted and signed transaction information to the system after executing attribute encryption.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where acquiring, from a cloud storage system, a private key and preset face data corresponding to the payer wallet address includes:
sending a query request to the cloud storage system, the query request including: a payer wallet address;
receiving query information returned by the cloud storage system according to the query request, wherein the query information comprises: a second data ciphertext comprising a private key associated with the payer wallet address and preset face data;
and decrypting the second data ciphertext according to the corresponding preset attribute password private key, and acquiring the private key corresponding to the wallet address of the payer and preset face data from the decrypted second data plaintext.
With reference to the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the method further includes:
judging whether the similarity value between the face data and preset face data is larger than a preset similarity threshold value or not;
when the similarity value between the face data and preset face data is larger than a preset similarity threshold value, determining that the face data and the preset face data meet a preset identification condition;
when the face data and the preset face data meet the preset identification condition, the method further comprises the following steps;
and after the encrypted and signed transaction information is broadcasted into the system, the payment success information is returned to the gateway.
With reference to the second aspect, an embodiment of the present invention provides a third possible implementation manner of the second aspect, where before decrypting the first data ciphertext received from the gateway according to the preset attribute secret key, the method includes:
and receiving a preset attribute password private key which is sent by the CA system and corresponds to the CA system.
In a third aspect, an embodiment of the present invention further provides a payment method based on a block chain, which is applied to a gateway, and includes:
receiving a first data ciphertext sent by a payee payment terminal, wherein the first data ciphertext comprises attribute-encrypted transaction information and face data, and the transaction information comprises a payer wallet address;
and sending the first data ciphertext to a face recognition server.
With reference to the third aspect, an embodiment of the present invention provides a first possible implementation manner of the third aspect, where before receiving a first data ciphertext sent by a payee payment terminal, the method includes:
receiving a payer wallet address sent by a payer payment terminal, and preset face data and a private key which are subjected to attribute encryption;
and uploading the wallet address of the payer, and the preset face data and the private key which are subjected to attribute encryption to a cloud storage system according to a preset data format.
With reference to the third aspect, an embodiment of the present invention provides a second possible implementation manner of the third aspect, where the method further includes:
receiving payment success information sent by the face recognition server;
and sending the payment success information to the payee payment terminal.
In a fourth aspect, the present invention also provides a computer-readable medium having non-volatile program code executable by a processor, where the program code causes the processor to execute the method of the second aspect or the third aspect.
The embodiment of the invention has the following beneficial effects: the invention provides a payment system and method based on a block chain, which introduce face brushing payment besides a traditional payment mode based on a payment terminal, can adapt to diversified payment scenes, and carry out attribute encryption on transaction information and face data, thereby not only meeting diversified payment requirements of users, but also improving payment safety.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a prior art payment flow diagram;
fig. 2 is a schematic structural diagram of a block chain-based payment system according to an embodiment of the present invention;
fig. 3 is a data flow diagram of a block chain based payment system according to an embodiment of the present invention;
fig. 4 is a flowchart of a block chain-based payment method according to another embodiment of the present invention;
fig. 5 is a flowchart of a block chain-based payment method according to another embodiment of the present invention;
FIG. 6 is a flowchart of a user registration process provided by another embodiment of the invention;
fig. 7 is a flow chart of face brushing payment according to another embodiment of the present invention.
Icon:
100-payee payment terminal; 200-a face recognition device; 300-a gateway; 400-a face recognition server; 500-a cloud storage system; 600-blockchain node.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
The noun explains:
and (4) encrypting the attributes, namely marking the file as different attributes, and encrypting the file by using the attributes. The method is characterized in that a private key and a ciphertext of a user are marked by an attribute set.
In the existing payment system implemented based on the blockchain technology, a user usually needs to complete a digital signature of a transaction by means of a hardware device (such as a mobile phone) storing a private key of the user, and the mode is single. For example, as shown in fig. 1, when a user 1 wants to transfer money to a user 2 through an intelligent terminal, the following steps are required.
1. Acquiring a collection address of a user 2;
2. organizing transaction information and signing by using a mobile phone;
3. broadcasting the signed transaction information to the system;
4. the node verifies the transaction information and records the transaction information into the block chain after the transaction information passes the verification;
5. user 2 retrieves the blockchain record and confirms that the transfer is complete.
At present, in the existing payment process, a user generally needs to complete digital signature on a transaction by means of hardware equipment for storing a private key of the user, the payment mode is single, the transaction information is not protected, the privacy of the user is easily revealed, diversified payment requirements and safety requirements of the user cannot be met, and inconvenience is brought to the user.
The attribute encryption algorithm in the embodiment of the invention confirms the attribute set according to the attribute of the visitor, such as a block chain node and a face recognition server. When encrypting, the combination of elements in the attribute set is used to specify a specific access control rule (i.e. a decryption rule), for example, when encrypting transaction data, the access control rule should be specified as ("block chain node" or "face recognition server"), that is, the block chain node or the face recognition server can decrypt the encrypted transaction data; when face data is encrypted, the access control rule is designated as "face recognition server", that is, the face recognition server can decrypt the encrypted face data.
For the convenience of understanding the embodiment, a detailed description will be given to a block chain based payment system disclosed in the embodiment of the present invention.
As shown in fig. 2 and 3, in an embodiment of the present invention, a block chain-based payment system is provided, where the system includes: a payee payment terminal 100, a face recognition device 200, a gateway 300, a face recognition server 400, a block link point 600, a CA system, a digital money system, and a cloud storage system 500.
Each user completes user registration through the own payment terminal, and in the registration process, the payment terminal generates a public and private key pair of the user and generates a user wallet address according to a public key. Then, the user sends a registration request containing the wallet address and the user information of the user to the digital currency system and the digital currency system through the payment terminal of the user so as to complete wallet account registration and receive the digital identity certificate sent by the CA system. In practical application, the payment terminal can be a mobile phone, a PAD and other intelligent devices.
Specifically, according to actual requirements, each payment terminal may be configured with a face recognition device 200 for acquiring face data corresponding to itself, and configured to acquire face data of a registered user in a registration process and face data of a payer user in a payment process. Preferably, the face recognition device 200 may be a high-definition camera, and the high-definition camera may be independently set with the payment terminal, or may be integrated with the camera in the payment terminal. In the user registration process, the payment terminal concatenates the private key subjected to the attribute encryption protection, the face data subjected to the attribute encryption protection and the user wallet address plaintext, and uploads the data to the cloud storage system 500 through the gateway 300 for storage.
When the payer pays money to the payee, the payer user can choose to pay with the payment terminal of the payer or choose to pay by swiping face. When a payer user selects face-brushing payment, the payee user generates transaction information through the payee payment terminal 100 of the payee user, receives face data acquired by face recognition equipment, and executes attribute encryption algorithms on the transaction information and the face data respectively, namely, when encrypting the transaction information, an access control rule is designated as (a face recognition server or a block chain node); when face data is encrypted, the specified access control rule is as follows: ("face recognition server"). And uploading the encrypted first data cipher text to the gateway 300.
The gateway 300 sends an equipment registration request, a gateway registration request and a wallet registration request to the CA system during the user registration process, and the CA system distributes an identity digital certificate, an enterprise certificate, a personal small-amount certificate, an equipment certificate, a gateway 300 certificate and the like according to each registration request and registers various certificates in the blockchain.
In the face-brushing payment process, the gateway 300 is configured to upload the first data ciphertext sent by the payee payment terminal 100 to the face recognition server 400.
The face recognition server 400 is configured to manage a payment private key hosted by each user after the registration of the user is completed. In the face-brushing payment process, the face recognition server 400 performs identity authentication (i.e., face verification) on the payer user, firstly decrypts the payer user according to a preset attribute password private key corresponding to the face recognition server, acquires face data and a payer wallet address in transaction information from a first data plaintext obtained by decryption, and acquires a private key corresponding to the payer wallet address and preset face data from the cloud storage system 500. And then judging whether the face data and the preset face data meet preset identification conditions, calling the private key to sign the transaction information when the face data and the preset face data meet the preset identification conditions (namely the current face data and the preset face data correspond to the same payment user), and broadcasting the encrypted and signed transaction information into the system after executing attribute encryption. In addition, payment success information is returned to the gateway 300 after the encrypted and signed transaction information is broadcast into the system.
The face recognition server 400 is an intelligent device integrating two functions of face recognition and transaction. In practical applications, the face recognition server 400 implements two functions: recognizing a human face; the transaction module (including obtaining a user private key and using the private key for signature) can be realized by a plurality of mutually independent devices, for example, a face recognition server A only used for recognizing a face, and a transaction server B deployed with a proxy cloud wallet are used for transaction, if the face recognition server A successfully recognizes, the face recognition server A signs transaction information by using the private key of the face recognition server A, the signed transaction information is sent to the proxy cloud wallet, the proxy cloud wallet retrieves the user private key, and the user private key is used for signing the transaction information.
The block chain node 600 is used for verifying transactions, storing transaction records, executing intelligent contracts, maintaining block chains and the like.
The CA system is responsible for distributing various certificates and certificate management, and distributing attribute password private keys to the face recognition server 400 and each block chain node 600.
In practical applications, the CA system is further configured to generate an identity digital certificate according to a user wallet address sent by any payment terminal, transmit the identity digital certificate associated with the user wallet address to the payment terminal through the gateway 300, and add the identity digital certificate to the blockchain network. And, the CA system is configured to distribute respective corresponding preset attribute password private keys to the face recognition server 400 and the block chain node 600.
For example, the CA system sends a private key containing an attribute of "face recognition server" to the face recognition server 400, sends a private key containing an attribute of "blockchain node" to the blockchain node 600, and specifies an access control rule as "face recognition server" or "blockchain node" when encrypting transaction information; when face data is encrypted, an access control rule is designated as ("face recognition server").
And the digital currency system (namely, a central digital currency system) is used for generating a digital currency account corresponding to the user wallet address according to the registration request containing the user wallet address sent by the payment terminal.
According to the payment system based on the block chain, provided by the embodiment of the invention, in addition to the traditional payment mode based on the payment terminal, face-brushing payment is introduced, the payment system can adapt to diversified payment scenes, attribute encryption is carried out on transaction information and face data, diversified payment requirements of users can be met, and the payment safety is improved.
In another embodiment of the present invention, as shown in fig. 4, there is provided a payment method applied to the face recognition server in the above block chain based payment system, the method including the following steps.
S101, decrypting a first data ciphertext received from the gateway according to a preset attribute password private key corresponding to the gateway.
Specifically, in the face-brushing payment process, before the face recognition server receives a first data ciphertext containing face data and transaction information from the gateway, the face recognition server receives a preset attribute password private key which is sent by a CA system and corresponds to the face recognition server, and the first data ciphertext can be decrypted by using the attribute password private key to obtain the face data and the transaction information.
And S102, acquiring the face data and the wallet address of the payer in the transaction information from the decrypted first data plaintext.
S103, obtaining a private key and preset face data corresponding to the wallet address of the payer from a cloud storage system.
Specifically, the steps of obtaining a private key and preset face data corresponding to the wallet address of the payer from a cloud storage system include the following steps.
The face recognition server sends a query request to the cloud storage system, wherein the query request comprises: payer wallet address.
Receiving query information returned by the cloud storage system according to the query request, wherein the query information comprises: a second data cryptogram containing a private key associated with the payer wallet address and preset face data.
And decrypting the second data ciphertext according to the corresponding preset attribute password private key, and acquiring the private key corresponding to the wallet address of the payer and preset face data from the decrypted second data plaintext.
And S104, if the face data and the preset face data meet the preset identification condition, calling the private key to sign the transaction information, and broadcasting the encrypted and signed transaction information to the system after executing attribute encryption.
In practical application, after the face recognition server receives preset face data and a private key sent by a cloud storage system, whether the face data and the preset face data meet preset recognition conditions is judged. The specific judgment process is as follows: for example, whether a similarity value between the face data and preset face data is greater than a preset similarity threshold value is judged, and only when the similarity value between the face data and the preset face data is greater than the preset similarity threshold value, it is determined that the face data and the preset face data meet a preset identification condition, that is, the current face data and the preset face data correspond to the same payment user, and authentication of the identity of the payment user is completed. It is worthy to note that any particular value in all examples shown and described herein is to be construed as merely illustrative and not a limitation, and thus other examples of example embodiments may have different values.
And after the identity authentication of the payer user is passed, calling a private key of the payer user to sign the transaction information, performing attribute encryption on the signed transaction information, and broadcasting the encrypted and signed transaction information into the system so that each block link node receives the encrypted and signed transaction information. And each block link point decrypts the encrypted and signed transaction information according to a preset attribute password private key sent to the block link point by the CA system, and verifies the decrypted transaction information by using a digital identity certificate after decryption. The verification of the transaction information comprises the authentication of the signature, and also comprises the verification of whether the transaction meets the transaction conditions, for example, if the user A transfers 100 yuan to the user B, the verification of whether the transaction is signed by the user A is required, the verification of whether the account balance of the user A is not less than 100 yuan is required, and the successful transfer can be realized only when the transaction is signed by the user A and the account balance of the user A is not less than 100 yuan, so that the transaction is completed. And after the verification is passed, recording the transaction information passing the verification in the blockchain network.
And after the transaction information of the encrypted signature is broadcasted, sending payment success information to a gateway so that the gateway sends the payment success information to a payee payment terminal.
And when the identity authentication of the payer fails, the face recognition server sends payment failure information to the gateway, so that the gateway sends the payment failure information to the payee payment terminal.
In another embodiment of the present invention, as shown in fig. 5, there is provided a payment method applied to a gateway in the above block chain based payment system, the method including the following steps.
S201, receiving a first data ciphertext sent by a payment terminal of a payee, wherein the first data ciphertext comprises attribute-encrypted transaction information and face data, and the transaction information comprises a wallet address of the payer.
Specifically, before the gateway receives the first data ciphertext sent by the payee payment terminal, the payer user needs to complete face registration, and the specific registration method includes the following steps.
And the payer payment terminal uploads the wallet address plaintext of the payer, the private key subjected to attribute encryption and the preset face data subjected to attribute encryption to the cloud storage system according to a preset data format.
In practical application, when a payer user registers, the payer payment terminal encrypts attribute data and a private key of the payer user, and uploads a ciphertext and a payer wallet address plaintext after cascading.
And S202, sending the first data ciphertext to a face recognition server.
On the basis of the foregoing embodiment, the payment method applied to the gateway further includes the following steps.
And receiving payment success information sent by the face recognition server.
And sending the payment success information to the payee payment terminal.
The following describes a specific process of a payment method based on a block chain according to an embodiment of the present invention by way of example:
1) and initializing the system, wherein the CA system issues certificates (identity digital certificates, enterprise certificates, personal small certificates, equipment certificates, gateway certificates and the like) for relevant parties, and generates and distributes corresponding attribute password private keys for the face recognition server and each block link point.
2) User registration: as shown in fig. 6, the user generates a public and private key pair and a user wallet address through his/her payment terminal. If the user selects to activate the face-brushing payment function, face data needs to be input through the face recognition device. The payment terminal encrypts attributes of the face data of the user, concatenates the encrypted face data, the private key protected by the attribute encryption and the user wallet address plaintext, and uploads the data to the cloud storage system through the gateway according to the data format shown in the following table 1. And the cloud storage system sends storage completion prompt information to the payment terminal to prompt the user that the face registration is completed.
TABLE 1
Addr EABE(Keysign) EABE(Dataface)
3) And (3) payment process: as shown in fig. 7, when the payer user selects face-brushing payment, the payee payment terminal performs attribute encryption on the transaction information and the face data sent by the face recognition device, combines the transaction information ciphertext and the face data ciphertext to obtain a first data ciphertext, and finally sends the first data ciphertext to the face recognition server through the gateway.
And the face recognition server decrypts the first data ciphertext according to the attribute password private key sent to the face recognition server by the CA system to obtain the face data and the address of the wallet of the payer in the transaction information. Then the face recognition server sends an inquiry request containing the wallet address of the payer to the cloud storage system, and the cloud storage system returns an inquiry result to the face recognition server, wherein the inquiry result comprises: a second data cryptogram containing a private key associated with the payer wallet address and preset face data. And the face recognition server decrypts the second data ciphertext by using the attribute password private key of the face recognition server, so as to obtain the private key associated with the wallet address of the payer and preset face data. And finally, calling a face recognition algorithm to recognize the face data and the preset face data. If the face data and the preset face data correspond to the same payment user, namely identity authentication of the payment party is passed, a private key of the payment party user is called to sign the transaction, attribute encryption is carried out on the signed transaction information, and the encrypted and signed transaction information is broadcasted to a system comprising a plurality of block chain nodes. And each block chain node decrypts the encrypted and signed transaction information according to a preset attribute password private key sent to the block chain node by the CA system, verifies the transaction information by using a digital identity certificate after decryption, namely, verifies the signature authentication and the transaction conditions, and records the transaction information passing the verification in the block chain network if the verification passes.
And after the face recognition server broadcasts the transaction information of the encrypted signature, sending payment success information to the gateway, so that the gateway sends the payment success information to the payee payment terminal, and after receiving the payment success information, the payee payment terminal prompts the payee that the payment is successful, and the payment process is finished. And if the identity authentication of the user fails, the face recognition server returns payment failure information to the gateway, so that the gateway sends the payment failure information to the payee payment terminal to prompt the payee to pay failure, and the payment process is finished.
In addition, when the payer user chooses to use the payment terminal of the payer to pay, the transaction information is generated by using the payment terminal, and the user private key is used for signing and executing the attribute encryption and then the in-system broadcasting is carried out. And the block chain node receives the transaction information, decrypts the transaction information and verifies the transaction information. And if the verification is passed, recording the transaction information in the blockchain.
4) And (3) inquiring: and the payment terminal is also used for sending a query request to the block chain link points according to the query information input by the user, retrieving the block chain data after the block chain link points verify the query authority, decrypting the retrieved data and transmitting the query result plaintext to the payment terminal through the gateway.
For example, the user inputs his identity information and may query the balance in his wallet account.
The embodiment of the invention provides a payment system and method based on a block chain, which has the following advantages:
a) payment diversity:
in addition to the traditional payment mode based on the payment terminal, the embodiment of the invention introduces face brushing payment, can adapt to diversified payment scenes and meets diversified payment requirements of users.
b) High safety:
the transaction information is encrypted and protected, so that the safety is greatly improved, and the privacy of the user is protected.
c) High efficiency:
data (such as transaction data or face data) with a plurality of potential visitors is encrypted by using an attribute encryption algorithm, a ciphertext encrypted based on the attribute can be realized, and decryption can be performed by a plurality of persons, so that the efficiency is greatly improved.
In another embodiment of the present invention, there is also provided a computer readable medium having non-volatile program code executable by a processor, the program code causing the processor to execute the blockchain based payment method.
Unless specifically stated otherwise, the relative steps, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present invention.
The device provided by the embodiment of the present invention has the same implementation principle and technical effect as the method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the method embodiments without reference to the device embodiments.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The computer program product of the payment system based on the blockchain provided in the embodiment of the present invention includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, and is not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. A blockchain based payment system, comprising: the system comprises a payee payment terminal, face recognition equipment, a gateway, a face recognition server, block chain nodes and a cloud storage system;
the payee payment terminal is used for performing attribute encryption on transaction information and the face data collected by the face recognition equipment and sending a first data ciphertext obtained by encryption to the face recognition server through the gateway; the attribute encryption is to confirm an attribute set according to the attribute of a visitor;
the face recognition server is used for carrying out decryption according to a preset attribute password private key corresponding to the face recognition server, acquiring face data and a payer wallet address in transaction information from a first data plain text obtained by decryption, and acquiring a private key corresponding to the payer wallet address and preset face data from the cloud storage system; if the face data and the preset face data meet the preset identification condition, calling the private key to sign the transaction information, and broadcasting the encrypted and signed transaction information to the system after performing attribute encryption;
the block chain node is used for decrypting the encrypted and signed transaction information according to the preset attribute password private key corresponding to the block chain node, verifying the decrypted transaction information, and recording the transaction information passing the verification in the block chain network if the transaction information passing the verification passes;
the payment system further comprises: a payer payment terminal, a central digital currency system and a CA system;
the payer payment terminal is used for generating a public and private key pair and a payer wallet address according to user information of a payment user, receiving preset face data from face recognition equipment corresponding to the payer payment terminal, and sending the payer wallet address, a private key subjected to attribute encryption and the preset face data to a cloud storage system through the gateway;
the central digital currency system is used for generating a digital currency account corresponding to the payer wallet address according to a registration request containing the payer wallet address and sent by the payer payment terminal;
the CA system is also used for generating an identity digital certificate according to the wallet address of the payer sent by the payment terminal, transmitting the identity digital certificate associated with the wallet address of the payer to the payment terminal of the payer through the gateway and adding the identity digital certificate into the blockchain network; and distributing the preset attribute password private keys corresponding to the face recognition server and the block chain link points.
2. A payment method based on a block chain is applied to a face recognition server and is characterized by comprising the following steps:
decrypting a first data ciphertext received from the gateway according to a preset attribute password private key corresponding to the gateway;
acquiring the face data and the wallet address of the payer in the transaction information from the decrypted first data plain text;
acquiring a private key and preset face data corresponding to the wallet address of the payer from a cloud storage system;
if the face data and the preset face data meet the preset identification condition, calling the private key to sign the transaction information, and broadcasting the encrypted and signed transaction information to the system after performing attribute encryption; the attribute encryption is to confirm an attribute set according to the attribute of a visitor;
before decrypting the first data ciphertext received from the gateway according to the preset attribute password private key corresponding to the first data ciphertext, the method further comprises the following steps:
and receiving a preset attribute password private key which is sent by the CA system and corresponds to the CA system.
3. The method of claim 2, wherein obtaining a private key and preset face data corresponding to the payer wallet address from a cloud storage system comprises:
sending a query request to the cloud storage system, the query request including: a payer wallet address;
receiving query information returned by the cloud storage system according to the query request, wherein the query information comprises: a second data ciphertext comprising a private key associated with the payer wallet address and preset face data;
and decrypting the second data ciphertext according to the corresponding preset attribute password private key, and acquiring the private key corresponding to the wallet address of the payer and preset face data from the decrypted second data plaintext.
4. The method of claim 3, further comprising:
judging whether the similarity value between the face data and preset face data is larger than a preset similarity threshold value or not;
when the similarity value between the face data and preset face data is larger than a preset similarity threshold value, determining that the face data and the preset face data meet a preset identification condition;
when the face data and the preset face data meet the preset identification condition, the method further comprises the following steps;
and after the encrypted and signed transaction information is broadcasted into the system, the payment success information is returned to the gateway.
5. A payment method based on a block chain is applied to a gateway and is characterized by comprising the following steps:
receiving a first data ciphertext sent by a payee payment terminal, wherein the first data ciphertext comprises attribute-encrypted transaction information and face data, and the transaction information comprises a payer wallet address; the attribute encryption is to confirm an attribute set according to the attribute of a visitor;
sending the first data ciphertext to a face recognition server so that the face recognition server decrypts the first data ciphertext according to a preset attribute password private key corresponding to the face recognition server and received from a CA (certification authority) system;
before receiving a first data ciphertext sent by a payee payment terminal, the method comprises the following steps:
receiving a payer wallet address sent by a payer payment terminal, and preset face data and a private key which are subjected to attribute encryption;
uploading the payer wallet address, the preset face data subjected to attribute encryption and the private key to a cloud storage system according to a preset data format;
the method further comprises the following steps:
receiving payment success information sent by the face recognition server;
and sending the payment success information to the payee payment terminal.
6. A computer-readable medium having non-volatile program code executable by a processor, wherein the program code causes the processor to perform the method of any of claims 2 to 5.
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