CN114154978A - Key management method, transaction method and device for digital currency on block chain - Google Patents

Key management method, transaction method and device for digital currency on block chain Download PDF

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CN114154978A
CN114154978A CN202010930564.0A CN202010930564A CN114154978A CN 114154978 A CN114154978 A CN 114154978A CN 202010930564 A CN202010930564 A CN 202010930564A CN 114154978 A CN114154978 A CN 114154978A
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key
management
public key
transaction
blockchain
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杨婧鑫
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Rendong Holding Co ltd
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Rendong Holding 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
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3829—Payment protocols; Details thereof insuring higher security of transaction involving key management
    • 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
    • G06Q20/389—Keeping log of transactions for guaranteeing non-repudiation of 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
    • G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
    • G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange

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Abstract

The invention discloses a key management method, a transaction method and a device related to digital currency on a block chain, wherein the specific implementation mode of the method comprises the following steps: determining at least one pair of a first public key and a first private key corresponding to at least one blockchain account respectively, wherein the at least one pair of the first public key and the first private key correspond to identity information of the at least one blockchain account respectively, and the identity information corresponds to the same user; writing at least one first public key into a first key management contract of the block chain, wherein the first key management contract is generated by a management private key signature of a user; an association between at least one first public key in a first key management contract and a management private key is constructed. This embodiment enables the membership of the blockchain account to the user to be determined from the user's public key, and when the same user uses different blockchain accounts for transactions, the verifier can prove that these transactions were initiated by the same user.

Description

Key management method, transaction method and device for digital currency on block chain
Technical Field
The invention relates to the technical field of internet, in particular to a key management method, a transaction method and a device for digital currency on a block chain.
Background
The block chain accounts adopt an asymmetric encryption algorithm, one block chain account corresponds to a pair of a public key and a private key, wherein the public key is public, and the private key is only known by a user to which the block chain account belongs. The opening of the block chain account is very convenient, only a pair of public key and private key is generated by using an asymmetric encryption algorithm, and even if the opening of one block chain account is completed, a user does not need to submit personal data.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
like the same user may have several bank accounts, the same user may also have multiple blockchain accounts. However, it is not possible for the verifier to determine the membership of the blockchain account to the user, which in turn results in the verifier not being able to prove that the transactions originate from the same user when the same user uses different blockchain accounts for transactions.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a key management method, a transaction method and a device for digital currency on a blockchain, which can determine a membership relationship between a blockchain account and a user according to a public key of the user, and when the same user uses different blockchain accounts to perform transactions, a verifier can prove that the transactions are initiated by the same user.
To achieve the above object, according to an aspect of an embodiment of the present invention, there is provided a key management method for digital money on a blockchain.
The key management method for digital currency on a block chain in the embodiment of the invention comprises the following steps:
determining at least one pair of a first public key and a first private key corresponding to at least one blockchain account respectively, wherein the at least one pair of the first public key and the first private key correspond to identity information of the at least one blockchain account respectively, and the identity information corresponds to the same user;
writing at least one first public key into a first key management contract of the block chain, wherein the first key management contract is generated by a management private key signature of a user;
an association between at least one first public key in a first key management contract and a management private key is constructed.
Alternatively,
the method further comprises the following steps:
determining a newly added second public key;
the second public key and the first key management contract are signed using the management private key to generate a second key management contract to write the second public key to the second key management contract.
Alternatively,
the management private key is any one of the at least one first private key.
Alternatively,
determining at least one pair of a first public key and a first private key corresponding to at least one blockchain account respectively, including:
initiating a key generation request to a key generation system, wherein the key generation request comprises identity information corresponding to a blockchain account;
and receiving a first public key and a first private key returned by the key generation system according to the key generation request, wherein the first public key and the first private key are related to the identity information.
Alternatively,
before writing the at least one first public key into the first key management contract of the block chain, further comprising:
receiving a create request for a first key management contract, the create request signed by a management private key, the create request including a management public key corresponding to the management private key;
the signature of the creation request is verified against the management public key, and when the verification is passed, a first key management contract is created.
Alternatively,
the management public key is used as an identification of a first key management contract to identify that the first key management contract is associated with a user to which the management public key belongs.
To achieve the above object, according to an aspect of an embodiment of the present invention, there is provided a method of trading on digital money on a blockchain.
The transaction method related to digital currency on a block chain of the embodiment of the invention comprises the following steps:
receiving at least one transaction request which is respectively sent by at least one blockchain account and relates to digital currency, wherein the transaction request comprises: the transaction information signed by the first private key of the corresponding blockchain account and the first public key corresponding to the first private key;
for each transaction request, performing:
determining whether a first public key corresponding to the transaction request is included in a first key management contract of the blockchain;
when a first public key corresponding to the transaction request exists in the first key management contract, determining that a blockchain account sending the transaction request is associated with a user to which the management public key belongs according to the management public key corresponding to the management private key of the first key management contract;
the transaction requested by the transaction request is executed according to the transaction information.
Alternatively,
when there are a plurality of first key management contracts in the blockchain, the transaction request further includes: a management public key corresponding to the management private key;
determining whether a first public key corresponding to the transaction request is included in a first key management contract of the blockchain includes:
determining a first key management contract corresponding to the transaction request from a plurality of first key management contracts in the blockchain according to a management public key included in the transaction request;
it is determined whether a first public key is included in a first key management contract corresponding to the transaction request.
To achieve the above object, according to still another aspect of embodiments of the present invention, there is provided a key management apparatus for digital money on a blockchain.
The key management device related to digital currency on a block chain in the embodiment of the invention comprises a key determining module, a key writing module and a key association module; wherein:
the key determining module is used for determining at least one pair of a first public key and a first private key which correspond to at least one blockchain account respectively, wherein the at least one pair of the first public key and the first private key correspond to the identity information of the at least one blockchain account respectively, and the identity information corresponds to the same user;
the key writing module is used for writing the first public key determined by the key determining module into a first key management contract of the block chain, wherein the first key management contract is generated by a management private key signature of a user;
and the key association module is used for constructing an association relation between at least one first public key and the management private key in the first key management contract.
Alternatively,
the device also comprises a public key adding module and a contract generating module; wherein:
the public key adding module is used for determining a newly added second public key;
and the contract generating module is used for signing the second public key and the first key management contract by using the management private key so as to generate a second key management contract and write the second public key into the second key management contract.
Alternatively,
the management private key is any one of the at least one first private key.
Alternatively,
the key determining module comprises a key requesting unit and a key receiving unit; wherein:
the key generation system comprises a key request unit and a key generation unit, wherein the key request unit is used for initiating a key generation request to the key generation system, and the key generation request comprises identity information corresponding to a block chain account;
and the key receiving unit is used for receiving a first public key and a first private key returned by the key generation system according to the key generation request, wherein the first public key and the first private key are related to the identity information.
Alternatively,
the device also comprises a request receiving module and a signature verification module; wherein:
a request receiving module to receive a create request for a first key management contract, the create request being signed by a management private key, the create request including a management public key corresponding to the management private key;
and the signature verification module is used for verifying the signature of the creation request according to the management public key, and creating a first key management contract when the verification is passed.
Alternatively,
the management public key is used as an identification of a first key management contract to identify that the first key management contract is associated with a user to which the management public key belongs.
To achieve the above object, according to still another aspect of the embodiments of the present invention, there is provided a transaction apparatus for digital money on a blockchain.
The transaction device related to digital currency on a block chain in the embodiment of the invention comprises a transaction receiving module and a transaction executing module; wherein:
the transaction receiving module is used for receiving at least one transaction request which is respectively sent by at least one blockchain account and relates to the digital currency, wherein each transaction request comprises: the transaction information signed by the first private key of the corresponding blockchain account and the first public key corresponding to the first private key;
the transaction execution module is used for executing the following steps aiming at each transaction request received by the transaction receiving module:
determining whether a first public key corresponding to the transaction request is included in a first key management contract of the blockchain;
when a first public key corresponding to the transaction request exists in the first key management contract, determining that a blockchain account sending the transaction request is associated with a user to which the management public key belongs according to the management public key corresponding to the management private key of the first key management contract;
the transaction requested by the transaction request is executed according to the transaction information.
Alternatively,
when there are a plurality of first key management contracts in the blockchain, the transaction request further includes: a management public key corresponding to the management private key;
a transaction execution module further to, comprising:
determining a first key management contract corresponding to the transaction request from a plurality of first key management contracts in the blockchain according to a management public key included in the transaction request;
it is determined whether a first public key is included in a first key management contract corresponding to the transaction request.
To achieve the above object, according to an aspect of an embodiment of the present invention, there is provided a key management system.
A key management system of an embodiment of the present invention includes: the embodiment of the invention provides a key management device related to digital currency on a blockchain and a transaction device related to the digital currency on the blockchain.
To achieve the above object, according to still another aspect of embodiments of the present invention, there is provided an electronic device for managing a key.
An electronic device for managing a key according to an embodiment of the present invention includes: one or more processors; a storage device for storing one or more programs which, when executed by one or more processors, cause the one or more processors to implement a method for key management on digital money on a blockchain and a method for trading on digital money on a blockchain of embodiments of the present invention.
To achieve the above object, according to still another aspect of embodiments of the present invention, there is provided a computer-readable storage medium.
A computer-readable storage medium of an embodiment of the present invention has stored thereon a computer program that, when executed by a processor, implements a key management method on a blockchain with respect to digital money and a transaction method on a blockchain with respect to digital money of an embodiment of the present invention.
One embodiment of the above invention has the following advantages or benefits:
1. since one pair of the first public key and the first private key corresponds to one blockchain account, for at least one blockchain account of the same user, the corresponding first public key and the corresponding first private key need to be determined for each blockchain account, where each pair of the first public key and the first private key is related to the identity information of the user. The determined one or more first public keys are then written to a first key management contract generated from a management private key signature of the user, wherein the first key management contract is stored on the blockchain and corresponds to the user. And finally, constructing an association relation between at least one first public key and a management private key in the first key management contract, and indirectly constructing the association relation between the at least one first public key and the affiliated user because the management private key is exclusive to the user, so that the subordination relation between the blockchain account and the user can be determined, and when the same user uses different blockchain accounts to carry out transactions, a verifier can prove that the transactions are initiated by the same user.
2. In at least one blockchain account on the blockchain, each blockchain account may initiate one or more transaction requests, and each transaction request may include: the system comprises transaction information signed by a first private key of a corresponding blockchain account and a first public key corresponding to the first private key. After receiving the transaction requests, the following steps are executed for each transaction request: firstly, whether a first public key included in the transaction request exists in a first key management contract on a blockchain is determined, if yes, a blockchain account sending the transaction request is determined to be associated with a user to which the management public key belongs according to the management public key stored in the first key management contract, and finally the transaction requested by the transaction request is executed according to transaction information, so that the membership between the blockchain account and the user can be determined according to the public key of the user, and when the same user uses different blockchain accounts to conduct transactions, a verifier can prove that the transactions are initiated by the same user.
Further effects of the above-mentioned non-conventional alternatives will be described below in connection with the embodiments.
Drawings
The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:
FIG. 1 is a diagram illustrating the main steps of a method for key management of digital currency on a blockchain according to an embodiment of the present invention;
FIG. 2 is a block diagram of the main steps of a method for trading digital currency on a blockchain according to an embodiment of the invention;
FIG. 3 is a diagram illustrating major blocks of a key management apparatus for digital money on a blockchain according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the major modules of a transaction apparatus for digital currency on a blockchain according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a key management system according to an embodiment of the present invention;
FIG. 6 is an exemplary system architecture diagram in which embodiments of the present invention may be employed;
fig. 7 is a schematic block diagram of a computer system suitable for use in implementing a terminal device or server of an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
It should be noted that the embodiments of the present invention and the technical features of the embodiments may be combined with each other without conflict.
Fig. 1 is a schematic diagram illustrating the main steps of a key management method for digital currency on a blockchain according to an embodiment of the present invention.
As shown in fig. 1, a method for managing a key related to digital currency on a blockchain according to an embodiment of the present invention mainly includes the following steps:
step S101: determining at least one pair of a first public key and a first private key corresponding to at least one blockchain account respectively, wherein the at least one pair of the first public key and the first private key correspond to identity information of the at least one blockchain account respectively, and the identity information corresponds to the same user.
In the embodiment of the invention, the same user may only open one blockchain account or may open a plurality of blockchain accounts, and when the user opens the blockchain account, an IBC (Identity-Based Cryptograph, password Based on an Identity) system may be adopted, so that the user may directly use the own Identity information as the first public key, or may modify the own Identity information according to a certain rule and then use the modified own Identity information as the first public key, and then generate the corresponding first private key according to the first public key, and the virtual currency system interfacing with the bank in the future may be more efficient. The identity information may be an identity card number of the user or a mobile phone number of the user, and if the user is an enterprise, the identity information may also be a unified social credit code of the enterprise, which is not limited in the embodiment of the present invention. For example, a user selects to apply for two blockchain accounts by using his own identity card number and mobile phone number, then changes the last digit of the identity card number and mobile phone number to the letter "a" according to a preset rule, and then uses the letter "a" as two first public keys to generate two corresponding first private keys, and finally opens the two corresponding blockchain accounts according to the two pairs of first public keys and the two first private keys.
In the embodiment of the present invention, the process of obtaining the first public key according to the identity information and generating the first private key according to the first public key may be completed by a key generation system. Specifically, the method for determining at least one pair of a first public key and a first private key respectively corresponding to at least one blockchain account includes: initiating a key generation request to a key generation system, wherein the key generation request comprises identity information corresponding to a blockchain account; and receiving a first public key and a first private key returned by the key generation system according to the key generation request, wherein the first public key and the first private key are related to the identity information.
For example, a user initiates a key generation request to a key generation system, the key generation request includes a mobile phone number of the user, the key generation system changes the last digit of the mobile phone number of the user into a letter "a" as a first public key after receiving the key generation request, substitutes the letter "a" as a preset function, takes an output character string as a first private key corresponding to the first public key, and then returns the first public key and the first private key to the user, so that the user obtains a pair of the first public key and the first private key related to the mobile phone number of the user.
In the embodiment of the invention, based on the IBC system, the same user may also use the same identity information as the first public key to send a key generation request to different key generation systems, so as to generate a plurality of different first private keys. For example, a user directly uses a mobile phone number as a first public key to apply for a first private key from the key generation system X and also applies for a first private key from the key generation system Y, and since different key application systems have different preset functions, the two generated first private keys are different, and the user can open two corresponding blockchain accounts by using the same first public key and two corresponding different first private keys. When the user uses the two blockchain accounts to conduct transactions respectively, the same first public key only needs to be sent to the verifier. As can be seen from the above description, based on the IBC system, the user may select the identity information as the first public key, so that the obtained first public key has a small number of bits, and the user may also generate a plurality of corresponding first private keys according to the same first public key, so that the user can perform transactions through a plurality of blockchain accounts, and only needs to send one first public key to the verifier during verification, thereby solving the problem that the user needs to manage a plurality of first public keys at the same time, and reducing the amount of transmitted data.
Step S102: at least one first public key is written into a first key management contract of the block chain, wherein the first key management contract is generated by a management private key signature of a user.
In the embodiment of the invention, one or more first public keys corresponding to a plurality of blockchain accounts belonging to the same user are recorded and managed by a first key management contract stored on the blockchain and corresponding to the user. Wherein the first key management contract is signed by the user-specific management private key such that other block nodes may access, but not modify, the content in the first key management contract.
In the embodiment of the present invention, the management private key may be one arbitrarily selected by the user from the at least one first private key, or may be a private application applied by the user to the key generation system. For example, a user applies for two first private keys sk-pn-a and sk-pn-b by using a mobile phone number pn as a first public key, and applies for one first private key sk-id-a by using an identity card number id as the first public key, so that the user can select one of the three first private keys as a management private key, or specifically apply for one management private key sk-id-b by using the identity card number id. After the user uses the management private key to sign the first key management contract, since the management private key is proprietary to the user and cannot be obtained by others, the other block link points can know that the first key management contract has an association relation with the user after the signature on the first key management contract is verified to be correct according to the management public key corresponding to the management private key.
In this embodiment of the present invention, if the user is opening a blockchain account for the first time, before writing at least one first public key into a first key management contract of a blockchain, the creating, by a blockchain node, a first key management contract is required to be performed, where the creating includes: receiving a creation request for a first key management contract, wherein the creation request is signed by a management private key, the creation request including a management public key corresponding to the management private key; the signature of the creation request is verified against the management public key, and when the verification is passed, a first key management contract is created. After the first key management contract is created, at least one first public key is written into the first key management contract, and the first key management contract is stored to a block chain link point after being signed by a user using a management private key.
In this embodiment of the present invention, the method for verifying the signature of the creation request may be: the method comprises the steps of firstly calculating a hash value of the content of a creation request, then decrypting a signature by using a management public key included in the creation request, and if the hash value obtained after decrypting the signature is completely the same as the hash value calculated according to the content of the creation request, determining that the signature of the creation request is correct.
Step S103: an association between at least one first public key in a first key management contract and a management private key is constructed.
In the embodiment of the present invention, the management public key corresponding to the management private key may be stored in the first key management contract of the block chain, and used as an identifier of the first key management contract to construct an association relationship between the first public key and the management private key in the first key management contract, and since the management private key is owned by the user and cannot be obtained by others after the user signs a signature on the first key management contract using the management private key, the other block chain nodes may know that at least one first public key stored in the first key management contract is associated with the user to which the management public key belongs according to the signature on the first key management contract and the management public key stored in the first key management contract and corresponding to the management private key.
In the embodiment of the present invention, when at least one first public key is written into a first key management contract of a block chain and an association between at least one first public key in the first key management contract and a management private key is constructed, if a newly added second public key is needed to be stored by the same user, since the first key management contract is already signed by the management private key used by the user and cannot be modified, the management private key needs to be used to sign the newly added second public key and the first key management contract to generate a second key management contract, so that the second public key is written into the second key management contract, and the association between the newly added second public key and the management private key is constructed.
According to the key management method for digital currency on the blockchain, which is disclosed by the embodiment of the invention, as a pair of a first public key and a first private key corresponds to one blockchain account, for at least one blockchain account of the same user, the corresponding first public key and first private key need to be determined for each blockchain account, wherein each pair of the first public key and the first private key is related to the identity information of the user. The determined one or more first public keys are then written to a first key management contract generated from a management private key signature of the user, wherein the first key management contract is stored on the blockchain and corresponds to the user. And finally, constructing an association relation between at least one first public key and a management private key in the first key management contract, and indirectly constructing the association relation between the at least one first public key and the affiliated user because the management private key is exclusive to the user, so that the subordination relation between the blockchain account and the user can be determined, and when the same user uses different blockchain accounts to carry out transactions, a verifier can prove that the transactions are initiated by the same user.
Fig. 2 is a schematic diagram of the main steps of a method for trading digital money on a blockchain according to an embodiment of the present invention.
As shown in fig. 2, a method for trading digital money on a blockchain according to an embodiment of the present invention mainly includes the following steps:
step S201: receiving at least one transaction request which is respectively sent by at least one blockchain account and relates to digital currency, wherein the transaction request comprises: the transaction information signed by the first private key of the corresponding blockchain account and the first public key corresponding to the first private key; and steps S202-S204 are performed for each transaction request.
In the embodiment of the invention, the blockchain verification node receives at least one transaction request which is respectively sent by at least one blockchain account and relates to the digital currency, each transaction request comprises transaction information signed by a first private key of the corresponding blockchain account and a first public key corresponding to the first private key, and the first public key is used for verifying whether the signature on the transaction information is correct.
Step S202: it is determined whether a first public key corresponding to the transaction request is included in a first key management contract for the blockchain.
In this embodiment of the present invention, when only one first key management contract exists in the blockchain, the blockchain verification node traverses the first key management contract according to the received first public key, and determines whether the first key management contract on the blockchain includes the first public key corresponding to the transaction request.
In this embodiment of the present invention, when there are multiple first key management contracts in the blockchain, the transaction request may further include a management public key corresponding to the management private key, and then the blockchain verification node determines, according to the management public key included in the transaction request, a first key management contract corresponding to the transaction request from the multiple first key management contracts in the blockchain, and then determines whether the first key management contract corresponding to the transaction request includes the first public key. By the embodiment of the invention, the block chain verification node can conveniently search the corresponding key management contract according to the management public key and can quickly determine whether a plurality of transaction requests are associated with the same user.
Step S203: when a first public key corresponding to the transaction request exists in the first key management contract, determining that the blockchain account sending the transaction request is associated with the user to which the management public key belongs according to the management public key corresponding to the management private key of the first key management contract.
For example, in one embodiment of the invention, a user signs two related transactions with first private keys corresponding to two different first public keys, namely, signing transaction information a with a first private key sk-pn-a corresponding to the first public key pn, signing transaction information B with a first private key sk-id-a corresponding to the first public key id, and providing the first public key pn and the first public key id to the blockchain verification node. After the block chain verification node receives the signed transaction information A and transaction information B, the first public key pn and the first public key id, firstly, whether the first public key pn and the first public key id exist in a first key management contract on a block chain is searched, if yes, it is determined that a block chain account corresponding to the first public key pn and a block chain account corresponding to the first public key id belong to a user corresponding to a management public key stored in the first key management contract, and the transaction information A and the transaction information B are related transactions. And then the block chain verification node verifies the correctness of the transaction information A by using the first public key pn and verifies the correctness of the transaction information B by using the first public key id.
For example, in another embodiment of the present invention, the user signs two related transactions with the first private keys corresponding to two identical first public keys, that is, the user applies the first private keys sk-pn-a and sk-pn-b to the key generation system X and the key generation system Y respectively by using the mobile phone number pn as the first public key, and then signs the transaction information M with the first private keys sk-pn-a and signs the transaction information N with the first private keys sk-pn-b respectively. After receiving the signed transaction information M and transaction information N and the first public key pn, the blockchain verification node first searches whether the first public key pn exists in a first key management contract on the blockchain, and if so, determines that a blockchain account corresponding to the first public key pn belongs to a user corresponding to a management public key stored in the first key management contract. The block chain verification node then verifies the correctness of the transaction information M and the transaction information N with the first public key pn.
Step S204: the transaction requested by the transaction request is executed according to the transaction information.
According to the transaction method for digital currency on the blockchain, disclosed by the embodiment of the invention, in at least one blockchain account on the blockchain, each blockchain account may initiate one or more transaction requests, and each transaction request may include: the system comprises transaction information signed by a first private key of a corresponding blockchain account and a first public key corresponding to the first private key. After receiving the transaction requests, the following steps are executed for each transaction request: firstly, whether a first public key included in the transaction request exists in a first key management contract on a blockchain is determined, if yes, a blockchain account sending the transaction request is determined to be associated with a user to which the management public key belongs according to the management public key stored in the first key management contract, and finally the transaction requested by the transaction request is executed according to transaction information, so that the membership between the blockchain account and the user can be determined according to the public key of the user, and when the same user uses different blockchain accounts to conduct transactions, a verifier can prove that the transactions are initiated by the same user.
Fig. 3 is a schematic diagram of main blocks of a key management apparatus for digital money on a blockchain according to an embodiment of the present invention.
As shown in fig. 3, a key management apparatus 300 for digital currency on a blockchain according to an embodiment of the present invention includes a key determining module 301, a key writing module 302, and a key associating module 303; wherein:
a key determining module 301, configured to determine at least one pair of a first public key and a first private key corresponding to at least one blockchain account, where the at least one pair of the first public key and the first private key correspond to identity information of the at least one blockchain account, and the identity information corresponds to the same user;
a key writing module 302, configured to write the first public key determined by the key determining module 301 into a first key management contract of the block chain, where the first key management contract is generated by a management private key signature of a user;
a key association module 303, configured to construct an association relationship between at least one first public key in the first key management contract and the management private key.
In an embodiment of the present invention, the apparatus 300 further includes a public key adding module and a contract generating module; wherein:
the public key adding module is used for determining a newly added second public key;
and the contract generating module is used for signing the second public key and the first key management contract by using the management private key so as to generate a second key management contract and write the second public key into the second key management contract.
In one embodiment of the invention, the management private key is any one of the at least one first private key.
In one embodiment of the present invention, the key determination module 301 includes a key request unit and a key receiving unit; wherein:
the key generation system comprises a key request unit and a key generation unit, wherein the key request unit is used for initiating a key generation request to the key generation system, and the key generation request comprises identity information corresponding to a block chain account;
and the key receiving unit is used for receiving a first public key and a first private key returned by the key generation system according to the key generation request, wherein the first public key and the first private key are related to the identity information.
In one embodiment of the present invention, the apparatus 300 further comprises a request receiving module and a signature verifying module; wherein:
a request receiving module to receive a create request for a first key management contract, the create request being signed by a management private key, the create request including a management public key corresponding to the management private key;
and the signature verification module is used for verifying the signature of the creation request according to the management public key, and creating a first key management contract when the verification is passed.
In one embodiment of the invention, the management public key is used as an identification of the first key management contract to identify that the first key management contract is associated with the user to which the management public key belongs.
According to the key management device for digital currency on the blockchain, which is disclosed by the embodiment of the invention, since one pair of the first public key and the first private key corresponds to one blockchain account, for at least one blockchain account of the same user, the corresponding first public key and the corresponding first private key need to be determined for each blockchain account, wherein each pair of the first public key and the first private key is related to the identity information of the user. The determined one or more first public keys are then written to a first key management contract generated from a management private key signature of the user, wherein the first key management contract is stored on the blockchain and corresponds to the user. And finally, constructing an association relation between at least one first public key and a management private key in the first key management contract, and indirectly constructing the association relation between the at least one first public key and the affiliated user because the management private key is exclusive to the user, so that the subordination relation between the blockchain account and the user can be determined, and when the same user uses different blockchain accounts to carry out transactions, a verifier can prove that the transactions are initiated by the same user.
Fig. 4 is a schematic diagram of main modules of a transaction apparatus for digital money on a blockchain according to an embodiment of the present invention.
As shown in fig. 4, a transaction apparatus 400 related to digital currency on a blockchain according to an embodiment of the present invention includes a transaction receiving module 401 and a transaction executing module 402; wherein:
a transaction receiving module 401, configured to receive at least one transaction request regarding digital currency sent by at least one blockchain account, where each transaction request includes: the transaction information signed by the first private key of the corresponding blockchain account and the first public key corresponding to the first private key;
a transaction executing module 402, configured to execute, for each transaction request received by the transaction receiving module 401:
determining whether a first public key corresponding to the transaction request is included in a first key management contract of the blockchain;
when a first public key corresponding to the transaction request exists in the first key management contract, determining that a blockchain account sending the transaction request is associated with a user to which the management public key belongs according to the management public key corresponding to the management private key of the first key management contract;
the transaction requested by the transaction request is executed according to the transaction information.
In one embodiment of the invention, when there are a plurality of first key management contracts in the blockchain, the transaction request further comprises: a management public key corresponding to the management private key;
the transaction execution module 402 is further configured to:
determining a first key management contract corresponding to the transaction request from a plurality of first key management contracts in the blockchain according to a management public key included in the transaction request;
it is determined whether a first public key is included in a first key management contract corresponding to the transaction request.
A transaction apparatus for digital currency on a blockchain according to an embodiment of the present invention can be seen that, among at least one blockchain account on the blockchain, each blockchain account may initiate one or more transaction requests, and each transaction request may include: the system comprises transaction information signed by a first private key of a corresponding blockchain account and a first public key corresponding to the first private key. After receiving the transaction requests, the following steps are executed for each transaction request: firstly, whether a first public key included in the transaction request exists in a first key management contract on a blockchain is determined, if yes, a blockchain account sending the transaction request is determined to be associated with a user to which the management public key belongs according to the management public key stored in the first key management contract, and finally the transaction requested by the transaction request is executed according to transaction information, so that the membership between the blockchain account and the user can be determined according to the public key of the user, and when the same user uses different blockchain accounts to conduct transactions, a verifier can prove that the transactions are initiated by the same user.
Fig. 5 is a schematic diagram of a key management system according to an embodiment of the present invention.
As shown in fig. 5, a key management system 500 according to an embodiment of the present invention includes: the embodiments of the present invention provide a key management apparatus 300 for digital money on a blockchain and a transaction apparatus 400 for digital money on a blockchain.
Fig. 6 illustrates an exemplary system architecture 600 of a method of key management on a blockchain for digital currency, a method of transaction on a blockchain for digital currency, a key management device on a blockchain for digital currency, or a transaction device on a blockchain for digital currency, to which embodiments of the present invention may be applied.
As shown in fig. 6, the system architecture 600 may include terminal devices 601, 602, 603, a network 604, and a server 605. The network 604 serves to provide a medium for communication links between the terminal devices 601, 602, 603 and the server 605. Network 604 may include various types of connections, such as wire, wireless communication links, or fiber optic cables, to name a few.
A user may use the terminal devices 601, 602, 603 to interact with the server 605 via the network 604 to receive or send messages or the like. Various communication client applications, such as shopping applications, web browser applications, search applications, instant messaging tools, mailbox clients, social platform software, and the like, may be installed on the terminal devices 601, 602, and 603.
The terminal devices 601, 602, 603 may be various electronic devices having a display screen and supporting web browsing, including but not limited to smart phones, tablet computers, laptop portable computers, desktop computers, and the like.
The server 605 may be a server that provides various services, such as a background management server that supports shopping websites browsed by users using the terminal devices 601, 602, and 603. The background management server may analyze and perform other processing on the received data such as the product information query request, and feed back a processing result (e.g., target push information and product information) to the terminal device.
It should be understood that the number of terminal devices, networks, and servers in fig. 6 is merely illustrative. There may be any number of terminal devices, networks, and servers, as desired for implementation.
Referring now to FIG. 7, shown is a block diagram of a computer system 700 suitable for use with a terminal device implementing an embodiment of the present invention. The terminal device shown in fig. 7 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
As shown in fig. 7, the computer system 700 includes a Central Processing Unit (CPU)701, which can perform various appropriate actions and processes in accordance with a program stored in a Read Only Memory (ROM)702 or a program loaded from a storage section 708 into a Random Access Memory (RAM) 703. In the RAM 703, various programs and data necessary for the operation of the system 700 are also stored. The CPU 701, the ROM 702, and the RAM 703 are connected to each other via a bus 704. An input/output (I/O) interface 705 is also connected to bus 704.
The following components are connected to the I/O interface 705: an input portion 706 including a keyboard, a mouse, and the like; an output section 707 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage section 708 including a hard disk and the like; and a communication section 709 including a network interface card such as a LAN card, a modem, or the like. The communication section 709 performs communication processing via a network such as the internet. A drive 710 is also connected to the I/O interface 705 as needed. A removable medium 711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 710 as necessary, so that a computer program read out therefrom is mounted into the storage section 708 as necessary.
In particular, according to the embodiments of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 709, and/or installed from the removable medium 711. The computer program performs the above-described functions defined in the system of the present invention when executed by the Central Processing Unit (CPU) 701.
It should be noted that the computer readable medium shown in the present invention can be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present invention, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present invention, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
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 or flowchart illustration, and combinations of blocks in the block diagrams 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 modules described in the embodiments of the present invention may be implemented by software or hardware. The described modules may also be provided in a processor, which may be described as: a processor includes a key determination module, a key write module, and a key association module. Where the names of these modules do not in some cases constitute a definition of the module itself, for example, the key write module may also be described as a "module in a first key management contract that writes a first public key to a chain of blocks".
As another aspect, the present invention also provides a computer-readable medium that may be contained in the apparatus described in the above embodiments; or may be separate and not incorporated into the device. The computer readable medium carries one or more programs which, when executed by a device, cause the device to comprise: determining at least one pair of a first public key and a first private key corresponding to at least one blockchain account respectively, wherein the at least one pair of the first public key and the first private key correspond to identity information of the at least one blockchain account respectively, and the identity information corresponds to the same user; writing at least one first public key into a first key management contract of the block chain, wherein the first key management contract corresponds to the user and is generated by a management private key signature of the user; an association between at least one first public key in a first key management contract and a management private key is constructed.
The computer readable medium carries one or more programs which, when executed by a device, cause the device to further include: receiving at least one transaction request respectively sent by at least one blockchain account, wherein the transaction request comprises: the transaction information signed by the first private key of the corresponding blockchain account and the first public key corresponding to the first private key; for each transaction request, performing: determining whether a first public key corresponding to the transaction request is included in a first key management contract of the blockchain; when a first public key corresponding to the transaction request exists in the first key management contract, determining that a blockchain account sending the transaction request is associated with a user to which the management public key belongs according to the management public key corresponding to the management private key of the first key management contract; the transaction requested by the transaction request is executed according to the transaction information.
According to the technical scheme of the embodiment of the invention, the method has at least the following advantages or beneficial effects:
1. since one pair of the first public key and the first private key corresponds to one blockchain account, for at least one blockchain account of the same user, the corresponding first public key and the corresponding first private key need to be determined for each blockchain account, where each pair of the first public key and the first private key is related to the identity information of the user. The determined one or more first public keys are then written to a first key management contract generated from a management private key signature of the user, wherein the first key management contract is stored on the blockchain and corresponds to the user. And finally, constructing an association relation between at least one first public key and a management private key in the first key management contract, and indirectly constructing the association relation between the at least one first public key and the affiliated user because the management private key is exclusive to the user, so that the subordination relation between the blockchain account and the user can be determined, and when the same user uses different blockchain accounts to carry out transactions, a verifier can prove that the transactions are initiated by the same user.
2. In at least one blockchain account on the blockchain, each blockchain account may initiate one or more transaction requests, and each transaction request may include: the system comprises transaction information signed by a first private key of a corresponding blockchain account and a first public key corresponding to the first private key. After receiving the transaction requests, the following steps are executed for each transaction request: firstly, whether a first public key included in the transaction request exists in a first key management contract on a blockchain is determined, if yes, a blockchain account sending the transaction request is determined to be associated with a user to which the management public key belongs according to the management public key stored in the first key management contract, and finally the transaction requested by the transaction request is executed according to transaction information, so that the membership between the blockchain account and the user can be determined according to the public key of the user, and when the same user uses different blockchain accounts to conduct transactions, a verifier can prove that the transactions are initiated by the same user.
The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (19)

1. A method for key management on digital currency on a blockchain, comprising:
determining at least one pair of a first public key and a first private key corresponding to at least one blockchain account respectively, wherein the at least one pair of the first public key and the first private key correspond to identity information of the at least one blockchain account respectively, and the identity information corresponds to the same user;
writing at least one of the first public keys into a first key management contract of the blockchain, wherein the first key management contract is generated by a management private key signature of the user;
and constructing an association relation between at least one first public key in the first key management contract and the management private key.
2. The method of claim 1, further comprising:
determining a newly added second public key;
signing the second public key and the first key management contract using the management private key to generate a second key management contract to write the second public key to the second key management contract.
3. The method according to claim 1 or 2, comprising:
the management private key is any one of the at least one first private key.
4. The method of claim 1, wherein determining at least one pair of a first public key and a first private key corresponding to at least one blockchain account comprises:
initiating a key generation request to a key generation system, wherein the key generation request comprises identity information corresponding to the blockchain account;
and receiving the first public key and the first private key returned by the key generation system according to the key generation request, wherein the first public key and the first private key are related to the identity information.
5. The method of claim 1, further comprising, prior to said writing at least one of said first public keys into a first key management contract for said block chain:
receiving a create request for the first key management contract, the create request being signed by the management private key, the create request including a management public key corresponding to the management private key;
and verifying the signature of the creation request according to the management public key, and creating the first key management contract when the verification is passed.
6. The method of claim 5, comprising:
using the management public key as an identification of the first key management contract to identify that the first key management contract is associated with a user to which the management public key belongs.
7. A method of trading digital currency on a blockchain, comprising:
receiving at least one transaction request which is respectively sent by at least one blockchain account and relates to digital currency, wherein the transaction request comprises: the transaction information signed by a first private key of the corresponding blockchain account and a first public key corresponding to the first private key;
for each of the transaction requests, performing:
determining whether a first key management contract of a blockchain includes the first public key corresponding to the transaction request;
when a first public key corresponding to the transaction request exists in the first key management contract, determining that the blockchain account sending the transaction request is associated with a user to which the management public key belongs according to a management public key corresponding to a management private key of the first key management contract;
and executing the transaction requested by the transaction request according to the transaction information.
8. The method of claim 7, wherein when a plurality of the first key management contracts are present in the blockchain, the transaction request further comprises: the management public key corresponding to the management private key;
the determining whether the first public key corresponding to the transaction request is included in a first key management contract of the blockchain includes:
determining a first key management contract corresponding to the transaction request from a plurality of first key management contracts in the block chain according to a management public key included in the transaction request;
it is determined whether the first public key is included in a first key management contract corresponding to the transaction request.
9. A key management device for digital currency on a blockchain is characterized by comprising a key determining module, a key writing module and a key correlation module; wherein:
the key determining module is configured to determine at least one pair of a first public key and a first private key corresponding to at least one blockchain account, where the at least one pair of the first public key and the first private key correspond to identity information of the at least one blockchain account, and the identity information corresponds to the same user;
the key writing module is configured to write the first public key determined by the key determining module into a first key management contract of the block chain, where the first key management contract is generated by a management private key signature of the user;
the key association module is configured to construct an association relationship between at least one first public key in the first key management contract and the management private key.
10. The apparatus of claim 9, further comprising a public key adding module and a contract generating module; wherein:
the public key adding module is used for determining a newly added second public key;
the contract generation module is configured to sign the second public key and the first key management contract using the management private key to generate a second key management contract, and write the second public key into the second key management contract.
11. The apparatus according to claim 9 or 10, comprising:
the management private key is any one of the at least one first private key.
12. The apparatus of claim 9, wherein the key determination module comprises a key request unit and a key receiving unit; wherein:
the key request unit is configured to initiate a key generation request to a key generation system, where the key generation request includes identity information corresponding to the blockchain account;
the key receiving unit is configured to receive the first public key and the first private key returned by the key generation system according to the key generation request, where the first public key and the first private key are related to the identity information.
13. The apparatus of claim 9, further comprising a request receiving module and a signature verification module; wherein:
the request receiving module is configured to receive a creation request for the first key management contract, where the creation request is signed by the management private key, and the creation request includes a management public key corresponding to the management private key;
and the signature verification module is used for verifying the signature of the creation request according to the management public key, and creating the first key management contract when the verification is passed.
14. The apparatus of claim 13, comprising:
using the management public key as an identification of the first key management contract to identify that the first key management contract is associated with a user to which the management public key belongs.
15. A transaction device related to digital currency on a blockchain is characterized by comprising a transaction receiving module and a transaction executing module; wherein:
the transaction receiving module is configured to receive at least one transaction request regarding digital currency, where the at least one transaction request is sent by at least one blockchain account, and each transaction request includes: the transaction information signed by a first private key of the corresponding blockchain account and a first public key corresponding to the first private key;
the transaction executing module is configured to execute, for each transaction request received by the transaction receiving module:
determining whether a first key management contract of a blockchain includes the first public key corresponding to the transaction request;
when a first public key corresponding to the transaction request exists in the first key management contract, determining that the blockchain account sending the transaction request is associated with a user to which the management public key belongs according to a management public key corresponding to a management private key of the first key management contract;
and executing the transaction requested by the transaction request according to the transaction information.
16. The apparatus of claim 15, wherein when a plurality of the first key management contracts are present in the blockchain, the transaction request further comprises: the management public key corresponding to the management private key;
the transaction execution module is further configured to, including:
determining a first key management contract corresponding to the transaction request from a plurality of first key management contracts in the block chain according to a management public key included in the transaction request;
it is determined whether the first public key is included in a first key management contract corresponding to the transaction request.
17. A key management system, comprising: a key management device for digital currency on a blockchain as claimed in any one of claims 9 to 14 and a transaction device for digital currency on a blockchain as claimed in claim 15 or 16.
18. An electronic device for managing keys, comprising:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-6 or 7-8.
19. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1-6 or 7-8.
CN202010930564.0A 2020-09-07 2020-09-07 Key management method, transaction method and device for digital currency on block chain Pending CN114154978A (en)

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