CN106779704A - A kind of block chain anonymous deal method based on ring signatures - Google Patents

A kind of block chain anonymous deal method based on ring signatures Download PDF

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Publication number
CN106779704A
CN106779704A CN201611107703.XA CN201611107703A CN106779704A CN 106779704 A CN106779704 A CN 106779704A CN 201611107703 A CN201611107703 A CN 201611107703A CN 106779704 A CN106779704 A CN 106779704A
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contract
ring
public key
sender
block chain
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梁秀波
李启雷
尹可挺
李伟
邱炜伟
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Hangzhou Qulian Technology Co Ltd
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Hangzhou Qulian 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
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/383—Anonymous user system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3066—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
    • H04L9/3255—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures using group based signatures, e.g. ring or threshold signatures

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

Abstract

The invention discloses a kind of block chain anonymous deal method based on ring signatures.Comprise the following steps：1) transaction sender transfers accounts to contract, and contract storage transfer amounts simultaneously return to a random public key ring；2) sender generates destination address and a special parameter R using the public key of recipient；3) sender carries out ring signatures to one group of Transaction Information；4) sender will sign and be sent to contract together with its signature contents；5) contract will be verified to the ring signatures for receiving；6) contract by public key ring it is corresponding storage the amount of money from contract account transfer to destination address；7) recipient obtains transfer amounts, and recipient obtains corresponding target account address and its private key.The present invention solves the problems, such as that the address of both parties in traditional block chain transaction is completely exposed, and realizes the function of the anonymous refund and anonymous receipt on account on block chain.

Description

A kind of block chain anonymous deal method based on ring signatures
Technical field
Ring signatures are based on the present invention relates to ring signatures technology, elliptic curve and block chain technology, more particularly to one kind Block chain anonymous deal method.
Background technology
Block chain technology, block chain is a kind of new decentralization agreement, can safely store digital cash and conclude the business or it His data, information can not be forged and distorted, and the trade confirmation on block chain is completed jointly by all nodes on block chain, by altogether Know algorithm and ensure its consistency, a public account book is safeguarded on block chain, for all users in memory block chain network Remaining sum, public account book is visible positioned at any node in memory block, so as to ensure that it can not forge and distort.
Ring signatures are a kind of special cryptography signatures, and it is able to demonstrate that signer possesses a correspondence specific collection public key Private key, the identity (private key correspondence which public key) without exposing signer.The method can be hidden in signer So as to reach anonymous effect in one collective, its technical characterstic main points is：When user can be known when transferring accounts using ring signatures Other signer identity, only needs to the set where knowing signer during checking, be not required to expose the actual public key of user, therefore user True hidden.Transaction Information full disclosure for traditional block chain transaction causes the identity of both parties to expose nothing The problem of something lost, the application of ring signatures technology can make the user on block chain realize anonymous refund function.
Elliptic curve, elliptic curve is a kind of asymmetrical AES, and the key generation of elliptic curve is calculated Method can generate a pair public and private keys when performing.The account address of user is exactly public key on block chain, and the private key of user is exactly that its is right The private key answered.The present invention uses the address of transferring accounts that elliptic curve produces a destination address as contract, and destination address is What the public key of the random number combination recipient produced by sender was generated, only transaction acceptance person could obtain the private of destination address Key, therefore, the true identity of recipient cannot be learnt on block chain except the other users of the sender that concludes the business.Equally, for biography The Transaction Information full disclosure of the block chain transaction of system causes the problem that the identity of both parties is completely exposed, the application of the method The user on block chain can be made to realize anonymous receipt on account function.
The content of the invention
The purpose of the present invention is directed to the deficiencies in the prior art, there is provided a kind of block chain anonymous deal side based on ring signatures Method.
The purpose of the present invention is achieved through the following technical solutions：In a block chain network, conclude the business initiator Anonymous refund function is realized by contract account in the middle of, transaction acceptance side is by a destination address generated by sender Realize anonymous receipt on account function.The whole anonymous deal process of both parties, comprises the following steps：
1) transaction set-up procedure, transaction sender calls a specific intelligence contract method, is transferred accounts to contract address, closes Transfer amounts are about stored, and returns to a public key ring at random, public key of the public key ring comprising sender；
2) destination address is generated, sender produces a random number, and utilizes the public key of recipient to be calculated by elliptic curve Method generates destination address P and parameter R, destination address P=H (r*B) * G+B, parameter R=r*G；Parameters implication is as follows：
G:Elliptic curve special parameter, a basic point on elliptic curve；
H():A kind of hash algorithm；
r:The random number of sender's generation；
B:The public key of recipient, B=b*G, b for recipient private key, usually a string of hexadecimal digits, this algorithm is not It is reversible, i.e., B can only be obtained by b；
The destination address P of step generation, in addition to recipient, target cannot be obtained including other people including sender The private key of address；
3) generate ring signatures, sender using oneself private key and step 1) in public key ring, one group of Transaction Information is entered Row ring signatures, wherein Transaction Information include step 2) in generation destination address and parameter R；
4) ring signatures are sent, sender will sign and be sent to contract together with its signature contents；
5) ring signatures are verified, contract will be verified to the ring signatures for receiving, is proved to be successful, and can perform operation 6), test Card failure does not perform operation then；
6) perform contract transfer accounts, contract by public key ring it is corresponding storage the amount of money from contract account transfer to destination address, and The subsidiary parameter R in Transaction Information, sender completes anonymous refund；
7) recipient obtains transfer amounts：The friendship that recipient is initiated by all contracts on the block for inquiring about newest generation Easy information, extract carries out following computing per the parameter R in transaction information：
P '=H (b*R) * G+B,
Whether the P ' that judgement is obtained is consistent with the destination address in Transaction Information, if unanimously, the transaction is destined to certainly Oneself, recipient can carry out the private key x that following computing obtains destination address P；
X=H (b*R)+b,
Recipient has the public and private key of target account, completes anonymous receipt on account；This is arrived, recipient can enter to target account Any operation of row, i.e. recipient have received transfer amounts, and transaction is completed.Here, the target ground that we are produced using sender Location conceals the true identity of recipient well, that is, realize the anonymous receipt on account concluded the business on block chain.
Otherwise, can learn that this time is not sent to the transaction of oneself.
Further, described step 1) in contract receive transfer accounts after return to a public key ring, wherein contract can deposit first The transfer amounts of sender are stored up, and generates certain amount of public key at random, public key and transmission of the public key ring by these random generations The public key composition of person.
Further, described step 3) in, sender initiate transaction when, with oneself private key and step 1) return public affairs Key ring carries out ring signatures to Transaction Information, is herein the signature algorithm of ring signatures with algorithm, and the characteristic of ring signatures algorithm is ring In the ring signatures of any member's generation signature verification can be carried out by this public key ring, it is not necessary to corresponding public key is verified Signature.
Further, described step 5) in ring signatures verification process, contract receive transaction sender send label Name information, ring signatures checking is carried out using the public key ring of the storage in contract to signature, and ring signatures verification algorithm can be in contract Interior realization；Intelligent contract exists as a kind of form of the decentralization application on block chain, intelligently and about once deployed nothing Method is changed, and all users on block chain can call contract method, contract method to be built by contract founder, treaty content Store on block chain, its content full disclosure.By the storage corresponding with public key ring of the transfer amounts of sender on contract, so Other users on block chain cannot just learn corresponding which account of this amount of money, that is, realize the anonymity concluded the business on block chain Transfer accounts.
The beneficial effects of the invention are as follows：The present invention uses ring signatures technology on block chain to the transfer procedure of user, with And producing a non-existent target account of sheet for receipt on account during user's receipt on account, this is meeting block chain technology in itself The colleague of characteristic realizes the anonymous refund and anonymous receipt on account function of transaction.Process of exchange on traditional block chain, both parties Identity information be recorded on block chain with Transaction Information, the address full disclosure of both parties, it ensure that block Information can not forge and distort on chain, but expose customer transaction record information simultaneously.To protect the transaction privacy of user, this Invention carries out authentication to transaction initiator in transfer procedure of concluding the business with ring signatures, and such transaction initiator is hidden in one group In public key ring, so that the identity of sender is hidden；Made using an interim destination address for producing during receipt on account of concluding the business It is target account of transferring accounts, even if someone can be recorded with track transactions, cannot also learns the true identity of receipt on account people.It is of the invention effective Solve transaction privacy concern on traditional block chain.
Brief description of the drawings
Fig. 1 is transaction set-up procedure；
Fig. 2 is the process that sender performs anonymous deal；
Fig. 3 is the anonymous receipt on account process of recipient.
Specific embodiment
The present invention is described in detail below according to the drawings and specific embodiments, the purpose of the present invention and effect will become brighter It is aobvious.
As Figure 1-3, block chain anonymous deal method of the present invention based on ring signatures, comprises the following steps：
1) transaction set-up procedure, as shown in figure 1, transaction sender calls a specific intelligence contract method, to contract Address is transferred accounts, contract storage transfer amounts, and returns to a public key ring at random, public key of the public key ring comprising sender；
2) destination address is generated, sender produces a random number, and utilizes the public key of recipient to be calculated by elliptic curve Method generates destination address P and parameter R, destination address P=H (r*B) * G+B, parameter R=r*G；Parameters implication is as follows：
G:Elliptic curve special parameter, a basic point on elliptic curve；
H():A kind of hash algorithm；
r:The random number of sender's generation；
B:The public key of recipient, B=b*G, b for recipient private key, usually a string of hexadecimal digits, this algorithm is not It is reversible, i.e., B can only be obtained by b；
The destination address P of step generation, in addition to recipient, target cannot be obtained including other people including sender The private key of address；
3) generate ring signatures, sender using oneself private key and step 1) in public key ring, one group of Transaction Information is entered Row ring signatures, wherein Transaction Information include step 2) in generation destination address and parameter R；
4) ring signatures are sent, sender will sign and be sent to contract together with its signature contents；
5) ring signatures are verified, contract will be verified to the ring signatures for receiving, is proved to be successful, and can perform operation 6), test Card failure does not perform operation then；
6) perform contract transfer accounts, contract by public key ring it is corresponding storage the amount of money from contract account transfer to destination address, and The subsidiary parameter R in Transaction Information, sender completes anonymous refund；
7) recipient obtains transfer amounts：The friendship that recipient is initiated by all contracts on the block for inquiring about newest generation Easy information, extract carries out following computing per the parameter R in transaction information：
P '=H (b*R) * G+B,
Whether the P ' that judgement is obtained is consistent with the destination address in Transaction Information, if unanimously, the transaction is destined to certainly Oneself, recipient can carry out the private key x that following computing obtains destination address P；
X=H (b*R)+b,
Recipient has the public and private key of target account, completes anonymous receipt on account；This is arrived, recipient can enter to target account Any operation of row, i.e. recipient have received transfer amounts, and transaction is completed.Here, the target ground that we are produced using sender Location conceals the true identity of recipient well, that is, realize the anonymous receipt on account concluded the business on block chain.
Otherwise, can learn that this time is not sent to the transaction of oneself.
Further, described step 1) in contract receive transfer accounts after return to a public key ring, wherein contract can deposit first The transfer amounts of sender are stored up, and generates certain amount of public key at random, public key and transmission of the public key ring by these random generations The public key composition of person.
Further, described step 3) in, sender initiate transaction when, with oneself private key and step 1) return public affairs Key ring carries out ring signatures to Transaction Information, is herein the signature algorithm of ring signatures with algorithm, and the characteristic of ring signatures algorithm is ring In the ring signatures of any member's generation signature verification can be carried out by this public key ring, it is not necessary to corresponding public key is verified Signature.
Further, described step 5) in ring signatures verification process, contract receive transaction sender send label Name information, ring signatures checking is carried out using the public key ring of the storage in contract to signature, and ring signatures verification algorithm can be in contract Interior realization；Intelligent contract exists as a kind of form of the decentralization application on block chain, intelligently and about once deployed nothing Method is changed, and all users on block chain can call contract method, contract method to be built by contract founder, treaty content Store on block chain, its content full disclosure.By the storage corresponding with public key ring of the transfer amounts of sender on contract, so Other users on block chain cannot just learn corresponding which account of this amount of money, that is, realize the anonymity concluded the business on block chain Transfer accounts.
Below specific embodiment is illustrated with a block chain transaction examples：
The transaction that analog subscriber A transfers accounts to user B, trade initiator A, the destination address P of transaction recipient B, A generation.A Dealing money is transferred accounts to a specific intelligence contract, then contract is transferred accounts to target account address, last B obtains destination address Private key complete receipt on account.It is described in detail below：
First, during A should be stored to specific intelligent contract dealing money before formal initiation transaction, such as Fig. 1 institutes Show, after transaction is ready to complete, A will obtain the public key ring returned from contract method.When initiating transaction, A will produce one newly Destination address and subsidiary parameter R, then A signature operation will be carried out to the relevant information of destination address using ring signatures algorithm, And signature is sent to contract, as shown in Figure 2.After contract receives signing messages, it will ring signatures are verified to judge to sign Whether the identity of name person is correct.After the completion of contract is transferred accounts to target account, now B must enter receipt on account operation and could obtain and transfer accounts The amount of money.As shown in figure 3, B can inquire about the transaction completed on nearest block chain, the friendship initiated by contract can be only inquired about certainly Easily.Then B can solve address and its private key of target account by parameter R subsidiary in Transaction Information, so as to possess target The control of account, that is, complete receipt on account operation.

Claims (4)

1. a kind of block chain anonymous deal method based on ring signatures, it is characterised in that comprise the following steps：
1) transaction set-up procedure, transaction sender calls a specific intelligence contract method, is transferred accounts to contract address, and contract is deposited Storage transfer amounts, and a public key ring is returned at random, public key of the public key ring comprising sender；
2) destination address is generated, sender produces a random number, and utilizes the public key of recipient to be given birth to by elliptic curve Into destination address P and parameter R, destination address P=H (r*B) * G+B, parameter R=r*G；Parameters implication is as follows：
G:Elliptic curve special parameter, a basic point on elliptic curve；
H():A kind of hash algorithm；
r:The random number of sender's generation；
B:The public key of recipient, B=b*G, b are the private key of recipient, and this algorithm is irreversible, i.e., can only obtain B by b；
3) generate ring signatures, sender using oneself private key and step 1) in public key ring, ring is carried out to one group of Transaction Information Signature, wherein Transaction Information include step 2) in generation destination address and parameter R；
4) ring signatures are sent, sender will sign and be sent to contract together with its signature contents；
5) ring signatures are verified, contract will be verified to the ring signatures for receiving, is proved to be successful, and can perform operation 6), checking is lost Lose, do not perform operation；
6) perform contract transfer accounts, contract by public key ring it is corresponding storage the amount of money from contract account transfer to destination address, and hand over Subsidiary parameter R in easy information, sender completes anonymous refund；
7) recipient obtains transfer amounts：Recipient is believed by the transaction that all contracts on the block for inquiring about newest generation are initiated Breath, extract carries out following computing per the parameter R in transaction information：
P '=H (b*R) * G+B,
Whether the P ' that judgement is obtained is consistent with the destination address in Transaction Information, if unanimously, the transaction is destined to oneself, Recipient can carry out the private key x that following computing obtains destination address P；
X=H (b*R)+b,
Recipient has the public and private key of target account, completes anonymous receipt on account；
Otherwise, can learn that this time is not sent to the transaction of oneself.
2. a kind of block chain anonymous deal method based on ring signatures as claimed in claim 1, it is characterised in that described step It is rapid 1) in contract receive transfer accounts after return to a public key ring, wherein contract can store the transfer amounts of sender first, and at random Certain amount of public key is generated, public key ring is made up of the public key of these random generations and the public key of sender.
3. a kind of block chain anonymous deal method based on ring signatures as claimed in claim 1, it is characterised in that described step It is rapid 3) in, sender initiate transaction when, with oneself private key and step 1) return public key ring ring signatures are carried out to Transaction Information, It is herein the signature algorithm of ring signatures with algorithm, the characteristic of ring signatures algorithm is that the ring signatures of any member's generation in ring all may be used With by this public key ring carry out signature verification, it is not necessary to which corresponding public key verifies signature.
4. a kind of block chain anonymous deal method based on ring signatures as claimed in claim 1, it is characterised in that described step It is rapid 5) in ring signatures verification process, contract receive transaction sender send signing messages, using the storage in contract Public key ring carries out ring signatures checking to signature, and ring signatures verification algorithm can be realized in contract；Intelligent contract is used as block chain On a kind of decentralization application form exist, intelligence and cannot about be changed once deployed, all users on block chain Contract method, contract method can be called to be built by contract founder, treaty content is stored on block chain, and its content is complete It is open.By the storage corresponding with public key ring of the transfer amounts of sender on contract, the other users on such block chain just cannot Corresponding which account of this amount of money is learnt, that is, realizes the anonymous refund concluded the business on block chain.
CN201611107703.XA 2016-12-06 2016-12-06 A kind of block chain anonymous deal method based on ring signatures Pending CN106779704A (en)

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