CN107171794A - A kind of electronic document based on block chain and intelligent contract signs method - Google Patents

A kind of electronic document based on block chain and intelligent contract signs method Download PDF

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CN107171794A
CN107171794A CN201710498686.5A CN201710498686A CN107171794A CN 107171794 A CN107171794 A CN 107171794A CN 201710498686 A CN201710498686 A CN 201710498686A CN 107171794 A CN107171794 A CN 107171794A
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葛峰
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    • 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
    • H04L9/006—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols involving public key infrastructure [PKI] trust models
    • G—PHYSICS
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    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0643—Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • 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

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Abstract

A kind of electronic document based on block chain and intelligent contract signs method, it is using business platform server CS, multiple block chain node server TS and the intelligent contract script server JS of multiple block chains, wherein, business platform server CS is used for the access for receiving user and provides data interaction, CS and each block chain node server TS connection communications, each TS is communicated with corresponding JS, and data syn-chronization is kept between each TS database.Technology of the present invention based on block chain is applied and proposed, utilize the decentralization thought and its distributed account book of combination and intelligent contract mechanism of block chain, realize on the basis of independent of particular trusted main body, solve from technological layer and ensure electronic contract signature integrity problem.

Description

A kind of electronic document based on block chain and intelligent contract signs method
Technical field
The present invention relates to intelligent contract technical field, especially a kind of electronic document label based on block chain and intelligent contract Arranging method.
Background technology
At present, continuing to develop with ecommerce, traditional papery contract is replaced by electronic contract.But it is existing Electronic contract signature method all inevitably at least need one to estimate the main body that can be trusted to be participated in, such as safeguarded The CA centers of digital certificate, or the intervention based on the specific public notarial office for believing identity, although the CA based on PKIX Center is technically reliable, but reliable use must use the Ukey of hardware medium, cause property easy to use seriously to be owed Lack, although and the intervention based on notarial office can solve the objective believable identity problems of electronic contract platform in legal principle, This can only trust for the morals to notarial office completely, can not technically realize Reliable guarantee；It can be used just in practice Victory, but the solution of technically reliable is very rare.
The content of the invention
The purpose of the present invention is in view of the above-mentioned problems, proposing a kind of electronic document signature based on block chain and intelligent contract Method.
The technical scheme is that：
A kind of electronic document based on block chain and intelligent contract signs method, and it is using business platform server CS, many The individual block chain node server TS and intelligent contract script server JS of multiple block chains, wherein, business platform server CS is used In the access that receives user and provide data interaction, CS and each block chain node server TS connection communications, each TS with it is corresponding JS communicated, the step of data syn-chronization, this method are kept between each TS database includes：
The step of S1, initialization：
S1.1, using public key algorithm, be that CS issues key pair, wherein public key is PuKC, private key is PrKc；
S1.2, using public key algorithm, be that each TS issues key pair, public key is respectively PuKT1、PuKT2、 PuKT3、…、PuKTN, private key is respectively PrKT1、PrKT2、PrKT3、…、PrKTn；
S1.3, setting CS, TS and JS use unified Hash operation rule；
S1.4, for each TS and JS unique address is distributed, be expressed as AdT1、AdT2、AdT3、…AdTnAnd AdJ1、 AdJ2、AdJ3、…、AdJn；
S1.5, each User logs in CS are registered, and CS is that each user completes the examination ＆ verification of real name identity；
Sign flow
S2, signing are initiated
S2.1, user Alice log in CS, and importing needs to pass through user data with electronic document M, CS that Bob is signed jointly Library inquiry obtains Alice unique identity information XAWith communication information PA, and Bob unique identity information XBAnd the communication information PB, while CS is this signature task generation unique number N, by Alice XAAnd PAMerge, labeled as IDA, by Bob XBWith PBMerge, labeled as IDB；
S2.2, CS are to M, IDA、IDBHash operation is carried out respectively, obtains HC M、HC IDA、HC IDB, and by Alice this label Acting be engaged according to Bob communication information PBNotify to Bob；
S2.3, CS are by HC M、HC IDA、HC IDBTogether with mission number N, broadcasted to all block chain node server TS of the whole network, Request response；
S2.4, all TS for receiving broadcast will number the addition task form for being N, preserve mission bit stream HC M、HC IDA、 HC IDB, and response is decided whether according to server free degree；
S2.5, determine the block chain node server TS of response by HC M、HC IDA、HC IDBTogether with mission number N and oneself Address replies to CS as response message；
S2.6, CS randomly choose a conduct in all TS received response and had the right node TQ；
S2.7, CS are by M, IDA、IDBUse the public key PuK of the node TQ that has the rightTQEncryption, obtains M ', IDA’、IDB', pass through Address AdTQIt is sent to the node TQ that has the right；
While S2.8, progress step 2.7, CS is sent through PuK to the whole network TSTQEncrypt obtained M ', IDA’、IDB', and Numbering N task is notified to be chosen to be received all TS of notice by node TQ processing of having the right by M ', IDA’、IDB’、AdTQ It is recorded in the task form that numbering is N；
S2.9, the node TQ that has the right receive the encryption data that step 2.7 is sent, and use private key PrKTQDecryption, restore M, IDA、IDB, and Hash operation is carried out respectively to it, with verify cryptographic Hash whether with H beforeC M、HC IDA、HC IDBIt is consistent；Checking It is inconsistent, notify CS to initiate task again, checking is consistent then further by IDA、IDBIt is reduced to XA、PA、XB、PB；
S2.10, the node TQ that has the right are randomly choosed wherein from the intelligent contract script server JS of the block chain of all connections A conduct have the right server JQ；
S2.11, the node TQ that has the right are by HC M、XA、PA、XB、PBTogether with sole task numbering N and TQ address AdTQIt is sent to JQ Address AdJQ；After task is sent, the node TQ that has the right will decrypt obtained M, IDA、IDBAbandon, only preserve M ', the ID of encryptionA’、 IDB' enter database；
S2.12, server JQ receive informations of having the right；
S2.13, the server JQ that has the right are by HC M、XAWith current time tJQN is given birth to as parameter using random algorithm for Alice Into a random code RNA, pass through communication information PAIt is sent to Alice；Simultaneously by RNA、tJQThe form data that N deposit numberings are N Storehouse；JQ is by HC M、XBWith current time tJQN, as parameter, is that Bob generates a random code R using random algorithmNB, pass through communication Information PBIt is sent to Bob；Simultaneously by RNA、tJQThe form database that N deposit numberings are N；
S2.14, JQ are respectively to RNAAnd RNBHash operation is carried out, cryptographic Hash H (R are obtainedN) and H (R ANB), and together with task Numbering N and JQ address AdJQ, broadcasted to all TS node servers, receive the node server of broadcast by H (RNA)、H(RNB) And AdJQIt is stored in the task data list that numbering is N；(now, task form of all TS node servers in numbering N In synchronous recording HC M、HC IDA、HC IDB、AdTQ、H(RNA)、H(RNB) and AdJQ, and through TQ public keys PuKTQEncrypted M’、IDA’、IDB’)
S2.15, Alice log in CS, and M, the random code R that input JQ is sent are consulted into task NNA is literary to electronics to confirm Book M signature；Bob logs in CS, and M, the random code R that input JQ is sent are consulted into task NNBTo confirm the label to electronic document M Administration；
S2.16, CS are respectively to RNAAnd RNBHash operation is carried out, cryptographic Hash H (R are obtainedNA) ' and H (RNB) ', and by H (RNA) ' and H (RNB) ' broadcasted together with mission number N to all TS of the whole network, requests verification；
S2.17, the node of step 2.16 checking request is received respectively by H (RNA) ' and H (RNB) ' with preserving task N before H (R in listNA) and H (RNB) be compared, if H (RNA) ' and H (RNA) compare unanimously, then notify CS, H (RNA) ' compare Pass through, H (R are notified if inconsistentNA) ' compare do not pass through；If H (RNB) ' and H (RNB) compare unanimously, then notify CS, H (RNB) ' compare and pass through, the notice H (R as inconsistent ifNB) ' compare do not pass through；
The checking feedback result H (R that S2.18, CS are received from multiple nodesNA) ', compare by more than threshold value, then Alice Electronic document M signature task is completed；Compare by no more than threshold value, then Alice signatures failure；CS is received from multiple nodes Checking feedback result H (RNB) ', compare by the signature task completion more than threshold value, then Bob electronic documents M；Comparison passes through No more than threshold value, then Bob signatures failure；
S2.19, Alice and Bob electronic document M signature task are completed, then are signed successfully, and CS is under arbitrary node TS Carry the H for the task form that numbering is NC M、HC IDA、HC IDB、AdTQ、H(RNA)、H(RNB) and AdJQ, and M ', IDA’、IDB’。
Further, described each block chain intelligence contract script server JS is the default script being deployed on network The server of code is performed, as the intelligent contract script on block chain, the input of predetermined format can be received, and receiving After qualified input, computing output is completed.
Further, in institute step S1.3, CS, TS and JS are SHA256 algorithms using unified Hash operation rule.
Further, in institute step S2.1, unique identity information XAIt is that can carry out the information of real name identity examination ＆ verification, bag Include：ID card No., passport number or social security number, communication information PAIncluding cell-phone number, address, fax and electronics postal Case.
Further, in described step S2.3, CS is by HC M、HC IDA、HC IDBUse private key PrKcAfter signature, together with task Numbering N, is broadcasted to all block chain node server TS of the whole network, request response；Accordingly in step S2.5, the area of response is determined Block chain node server TS uses CS public key PuKCValidation task N signature is correct.
Further, in described step S2.5, determine that the block chain node server TS of response uses respective private key To HC M、HC IDA、HC IDBAfter being signed, CS is replied to as response message together with mission number N and the address of oneself；Accordingly In step S2.6, CS randomly chooses a progress signature verification in all TS received response, and signature correctly then should Block chain node server TS is used as the node TQ that has the right.
Further, in described step S2.6, all TS received response is ranked up by CS according to the time, and Selection is reached at first and the correct block chain node server TS of signature verification is used as the node TQ that has the right.
Further, in described step S2.11, the node TQ that has the right is by HC M、XA、PA、XB、PBUse private key PrKTQSignature Afterwards, together with sole task numbering N and TQ address AdTQIt is sent to JQ address AdJQ；In the step S2.12 of correspondence, clothes of having the right Business device JQ receives information, uses TQ public key PuKTQSignature verification.
Further, in described step S2.12, the server JQ that has the right receives information, judges HC M、XA、PA、XB、PBIt is defeated Whether entry format is consistent with preset rules, and format error then feeds back to TQ, and task termination, form unanimously then continues.
Further, this method also include verification step, when Bob need checking electronic document M whether signed by Bob, then Step is as follows：
S3.1, Bob log in checking request of the CS propositions to electronic document M；
S3.2, CS provide HC M、HC IDB、H(RNB) downloaded for Bob, and Hash operation instrument is provided；
S3.3, CS submit to number the checking request of Bob in task of being N to any TS nodes；
S3.4, receive step 3.3 request node according to the Ad recorded in numbering N tasksJQAddress, reports Bob's to JQ Checking request；
S3.5, JQ receive Bob checking requirement, and R is extracted from the assignment database that numbering is NNBAnd send to PB；
S3.6, Bob hold parameter M, XB、PB、RNBAnd HC M、HC IDB、H(RNB), Bob is right respectively using Hash operation instrument M、(XB+PB)、RNBCarry out Hash operation, and respectively with HC M、HC IDB、H(RNB) be compared, compare consistent then checking and complete, compile Number completed for N signature task by Bob, compare inconsistent then authentication failed, the non-Bob of the signature task that numbering is N is completed； The step of whether electronic document M is signed by it is verified the need for Alice ibid.
Beneficial effects of the present invention：
The present invention based on block chain technology application and proposes, using block chain decentralization thought and combine its be distributed Formula account book and intelligent contract mechanism, realize on the basis of independent of particular trusted main body, solve and protected from technological layer Demonstrate,prove electronic contract signature integrity problem.
Method is signed relative to traditional electronic contract, with following features：
1st, decentralization, system is no longer dependent on some and estimates believable main body；
2nd, distributed data base is disposed, without the disaster-tolerant backup problem for worrying data occur again；
3rd, data validity user can self-service verification, the report provided without relying on special body；
4th, platform can not pretend to be some user to initiate subscription request, good reliability to another user.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of electronic document based on block chain and intelligent contract signs method, it is taken using business platform Be engaged in the intelligent contract script server JS of device CS, multiple block chain node server TS and multiple block chains, wherein, business platform clothes Business device CS is used for the access for receiving user and provides data interaction, CS and each block chain node server TS connection communications, each TS is communicated with corresponding JS, and data syn-chronization, the intelligent contract script of described each block chain are kept between each TS database Server JS is that the default script being deployed on network performs the server of code, is used as the intelligent contract pin on block chain This, can receive the input of predetermined format, and after qualified input is received, the step of completing computing output, this method is wrapped Include：
The step of S1, initialization：
S1.1, using public key algorithm, be that CS issues key pair, wherein public key is PuKC, private key is PrKc；
S1.2, using public key algorithm, be that each TS issues key pair, public key is respectively PuKT1、PuKT2、 PuKT3、…、PuKTN, private key is respectively PrKT1、PrKT2、PrKT3、…、PrKTn；
S1.3, setting CS, TS and JS can use SHA256 algorithms using unified Hash operation rule；
S1.4, for each TS and JS unique address is distributed, be expressed as AdT1、AdT2、AdT3、…AdTnAnd AdJ1、 AdJ2、AdJ3、…、AdJn；
S1.5, each User logs in CS are registered, and CS is that each user completes the examination ＆ verification of real name identity；
Sign flow
S2, signing are initiated
S2.1, user Alice log in CS, and importing needs to pass through user data with electronic document M, CS that Bob is signed jointly Library inquiry obtains Alice unique identity information XAWith communication information PA, and Bob unique identity information XBAnd the communication information PB, while CS is this signature task generation unique number N, by Alice XAAnd PAMerge, labeled as IDA, by Bob XBWith PBMerge, labeled as IDB；Unique identity information XAIt is that can carry out the information of real name identity examination ＆ verification, including：ID card No., shield According to number or social security number, communication information PAIncluding cell-phone number, address, fax and E-mail address.
S2.2, CS are to M, IDA、IDBHash operation is carried out respectively, obtains HC M、HC IDA、HC IDB, and by Alice this label Acting be engaged according to Bob communication information PBNotify to Bob；
S2.3, CS are by HC M、HC IDA、HC IDBUse private key PrKcAfter signature, together with mission number N, to all block chains of the whole network Node server TS is broadcasted, request response；
S2.4, all TS for receiving broadcast will number the addition task form for being N, preserve mission bit stream HC M、HC IDA、 HC IDB, and response is decided whether according to server free degree；
S2.5, the block chain node server TS of decision response use CS public key PuKCValidation task N signature is correct, Using respective private key to HC M、HC IDA、HC IDBAfter being signed, response message is used as together with mission number N and the address of oneself Reply to CS；
S2.6, CS randomly choose a progress signature verification in all TS received response, and signature is correct then will Block chain node server TS is used as the node TQ that has the right；
S2.7, CS are by M, IDA、IDBUse the public key PuK of the node TQ that has the rightTQEncryption, obtains M ', IDA’、IDB', pass through Address AdTQIt is sent to the node TQ that has the right；
While S2.8, progress step 2.7, CS is sent through PuK to the whole network TSTQEncrypt obtained M ', IDA’、IDB', and Numbering N task is notified to be chosen to be received all TS of notice by node TQ processing of having the right by M ', IDA’、IDB’、AdTQ It is recorded in the task form that numbering is N；
S2.9, the node TQ that has the right receive the encryption data that step 2.7 is sent, and use private key PrKTQDecryption, restore M, IDA、IDB, and Hash operation is carried out respectively to it, with verify cryptographic Hash whether with H beforeC M、HC IDA、HC IDBIt is consistent；Checking It is inconsistent, notify CS to initiate task again, checking is consistent then further by IDA、IDBIt is reduced to XA、PA、XB、PB；
S2.10, the node TQ that has the right are randomly choosed wherein from the intelligent contract script server JS of the block chain of all connections A conduct have the right server JQ；
S2.11, the node TQ that has the right are by HC M、XA、PA、XB、PBUse private key PrKTQAfter signature, together with sole task numbering N and TQ address AdTQIt is sent to JQ address AdJQ；After task is sent, the node TQ that has the right will decrypt obtained M, IDA、IDBAbandon, Only preserve M ', the ID of encryptionA’、IDB' enter database；
S2.12, server JQ receive informations of having the right, use TQ public key PuKTQSignature verification, judges HC M、XA、PA、XB、PB Pattern of the input it is whether consistent with preset rules, format error then feeds back to TQ, and task termination, form unanimously then continues.
S2.13, the server JQ that has the right are by HC M、XAWith current time tJQN is given birth to as parameter using random algorithm for Alice Into a random code RNA, pass through communication information PAIt is sent to Alice；Simultaneously by RNA、tJQThe form data that N deposit numberings are N Storehouse；JQ is by HC M、XBWith current time tJQN, as parameter, is that Bob generates a random code R using random algorithmNB, pass through communication Information PBIt is sent to Bob；Simultaneously by RNA、tJQThe form database that N deposit numberings are N；
S2.14, JQ are respectively to RNAAnd RNBHash operation is carried out, cryptographic Hash H (R are obtainedN) and H (R ANB), and together with task Numbering N and JQ address AdJQ, broadcasted to all TS node servers, receive the node server of broadcast by H (RNA)、H(RNB) And AdJQIt is stored in the task data list that numbering is N；(now, task form of all TS node servers in numbering N In synchronous recording HC M、HC IDA、HC IDB、AdTQ、H(RNA)、H(RNB) and AdJQ, and through TQ public keys PuKTQEncrypted M’、IDA’、IDB’)
S2.15, Alice log in CS, and M, the random code R that input JQ is sent are consulted into task NNA is literary to electronics to confirm Book M signature；Bob logs in CS, and M, the random code R that input JQ is sent are consulted into task NNBTo confirm the label to electronic document M Administration；
S2.16, CS are respectively to RNAAnd RNBHash operation is carried out, cryptographic Hash H (R are obtainedNA) ' and H (RNB) ', and by H (RNA) ' and H (RNB) ' broadcasted together with mission number N to all TS of the whole network, requests verification；
S2.17, the node of step 2.16 checking request is received respectively by H (RNA) ' and H (RNB) ' with preserving task N before H (R in listNA) and H (RNB) be compared, if H (RNA) ' and H (RNA) compare unanimously, then notify CS, H (RNA) ' compare Pass through, H (R are notified if inconsistentNA) ' compare do not pass through；If H (RNB) ' and H (RNB) compare unanimously, then notify CS, H (RNB) ' compare and pass through, the notice H (R as inconsistent ifNB) ' compare do not pass through；
The checking feedback result H (R that S2.18, CS are received from multiple nodesNA) ', compare by more than threshold value, then Alice Electronic document M signature task is completed；Compare by no more than threshold value, then Alice signatures failure；CS is received from multiple nodes Checking feedback result H (RNB) ', compare by the signature task completion more than threshold value, then Bob electronic documents M；Comparison passes through No more than threshold value, then Bob signatures failure；
S2.19, Alice and Bob electronic document M signature task are completed, then are signed successfully, and CS is under arbitrary node TS Carry the H for the task form that numbering is NC M、HC IDA、HC IDB、AdTQ、H(RNA)、H(RNB) and AdJQ, and M ', IDA’、IDB’。
During specific implementation：
This method also includes verification step,
When Bob needs whether checking electronic document M is signed by Bob, then step is as follows：
S3.1, Bob log in checking request of the CS propositions to electronic document M；
S3.2, CS provide HC M、HC IDB、H(RNB) downloaded for Bob, and Hash operation instrument is provided；
S3.3, CS submit to number the checking request of Bob in task of being N to any TS nodes；
S3.4, receive step 3.3 request node according to the Ad recorded in numbering N tasksJQAddress, reports Bob's to JQ Checking request；
S3.5, JQ receive Bob checking requirement, and R is extracted from the assignment database that numbering is NNBAnd send to PB；
S3.6, Bob hold parameter M, XB、PB、RNBAnd HC M、HC IDB、H(RNB), Bob is right respectively using Hash operation instrument M、(XB+PB)、RNBCarry out Hash operation, and respectively with HC M、HC IDB、H(RNB) be compared, compare consistent then checking and complete, compile Number completed for N signature task by Bob, compare inconsistent then authentication failed, the non-Bob of the signature task that numbering is N is completed； The step of whether electronic document M is signed by it is verified the need for Alice ibid.
When Alice needs whether checking electronic document M is signed by Alice, then step is as follows：
S4.1, Alice log in checking request of the CS propositions to electronic document M；
S4.2, CS provide HC M、HC IDA、H(RNA) downloaded for Alice, and Hash operation instrument is provided；
S4.3, CS submit to number the checking request of Alice in task of being N to any TS nodes；
S4.4, receive step 4.3 request node according to the Ad recorded in numbering N tasksJQAddress, Alice is reported to JQ Checking request；
S4.5, JQ receive Alice checking requirement, and R is extracted from the assignment database that numbering is NNAAnd send to PA；
S4.6, Alice hold parameter M, XA、PA、RNAAnd HC M、HC IDA、H(RNA), Alice uses Hash operation instrument point It is other to M, (XA+PA)、RNACarry out Hash operation, and respectively with HC M、HC IDA、H(RNA) be compared, comparison has unanimously then been verified Into the signature task that numbering is N is completed by Alice, compares inconsistent then authentication failed, the non-Alice of signature task that numbering is N Complete.
The present invention based on block chain technology application and proposes, using block chain decentralization thought and combine its be distributed Formula account book and intelligent contract mechanism, realize on the basis of independent of particular trusted main body, solve and protected from technological layer Demonstrate,prove electronic contract signature integrity problem.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.

Claims (10)

1. a kind of electronic document based on block chain and intelligent contract signs method, it is using business platform server CS, multiple The block chain node server TS and intelligent contract script server JS of multiple block chains, wherein, business platform server CS is used for Receive the access of user and data interaction be provided, CS and each block chain node server TS connection communications, each TS with it is corresponding JS is communicated, and data syn-chronization is kept between each TS database, it is characterised in that included the step of this method：
The step of S1, initialization：
S1.1, using public key algorithm, be that CS issues key pair, wherein public key is PuKC, private key is PrKc；
S1.2, using public key algorithm, be that each TS issues key pair, public key is respectively PuKT1、PuKT2、PuKT3、…、 PuKTN, private key is respectively PrKT1、PrKT2、PrKT3、…、PrKTn；
S1.3, setting CS, TS and JS use unified Hash operation rule；
S1.4, for each TS and JS unique address is distributed, be expressed as AdT1、AdT2、AdT3、…AdTnAnd AdJ1、AdJ2、 AdJ3、…、AdJn；
S1.5, each User logs in CS are registered, and CS is that each user completes the examination ＆ verification of real name identity；
Sign flow
S2, signing are initiated
S2.1, user Alice log in CS, import the electronic document M for needing to sign jointly with Bob, and CS is looked into by customer data base Ask the unique identity information X for obtaining AliceAWith communication information PA, and Bob unique identity information XBWith communication information PB, together When CS for this signature task generation unique number N, by Alice XAAnd PAMerge, labeled as IDA, by Bob XBAnd PBClose And, labeled as IDB；
S2.2, CS are to M, IDA、IDBHash operation is carried out respectively, obtains HC M、HC IDA、HC IDB, and Alice this signature is appointed The communication information P being engaged according to BobBNotify to Bob；
S2.3, CS are by HC M、HC IDA、HC IDBTogether with mission number N, broadcasted to all block chain node server TS of the whole network, request rings Should；
S2.4, all TS for receiving broadcast will number the addition task form for being N, preserve mission bit stream HC M、HC IDA、HC IDB, And response is decided whether according to server free degree；
S2.5, determine the block chain node server TS of response by HC M、HC IDA、HC IDBMake together with mission number N and the address of oneself CS is replied to for response message；
S2.6, CS randomly choose a conduct in all TS received response and had the right node TQ；
S2.7, CS are by M, IDA、IDBUse the public key PuK of the node TQ that has the rightTQEncryption, obtains M ', IDA’、IDB', pass through address AdTQIt is sent to the node TQ that has the right；
While S2.8, progress step 2.7, CS is sent through PuK to the whole network TSTQEncrypt obtained M ', IDA’、IDB', and notify to compile Number N task has been chosen to be received all TS of notice by node TQ processing of having the right by M ', IDA’、IDB’、AdTQIt is recorded in The task form that numbering is N；
S2.9, the node TQ that has the right receive the encryption data that step 2.7 is sent, and use private key PrKTQDecryption, restores M, IDA、IDB, And Hash operation is carried out respectively to it, with verify cryptographic Hash whether with H beforeC M、HC IDA、HC IDBIt is consistent；Checking is inconsistent CS is then notified to initiate task again, checking is consistent then further by IDA、IDBIt is reduced to XA、PA、XB、PB；
S2.10, the node TQ that has the right randomly choose therein one from the intelligent contract script server JS of the block chain of all connections It is individual to be used as the server JQ that has the right；
S2.11, the node TQ that has the right are by HC M、XA、PA、XB、PBTogether with sole task numbering N and TQ address AdTQIt is sent to JQ ground Location AdJQ；After task is sent, the node TQ that has the right will decrypt obtained M, IDA、IDBAbandon, only preserve M ', the ID of encryptionA’、IDB’ Enter database；
S2.12, server JQ receive informations of having the right；
S2.13, the server JQ that has the right are by HC M、XAWith current time tJQN, as parameter, is Alice generations one using random algorithm Individual random code RNA, pass through communication information PAIt is sent to Alice；Simultaneously by RNA、tJQThe form database that N deposit numberings are N；JQ By HC M、XBWith current time tJQN, as parameter, is that Bob generates a random code R using random algorithmNB, pass through communication information PB It is sent to Bob；Simultaneously by RNA、tJQThe form database that N deposit numberings are N；
S2.14, JQ are respectively to RNAAnd RNBHash operation is carried out, cryptographic Hash H (R are obtainedN) and H (R ANB), and together with mission number N With JQ address AdJQ, broadcasted to all TS node servers, receive the node server of broadcast by H (RNA)、H(RNB) and AdJQ It is stored in the task data list that numbering is N；
S2.15, Alice log in CS, and M, the random code R that input JQ is sent are consulted into task NNA is to confirm to electronic document M's Signature；Bob logs in CS, and M, the random code R that input JQ is sent are consulted into task NNBTo confirm the signature to electronic document M；
S2.16, CS are respectively to RNAAnd RNBHash operation is carried out, cryptographic Hash H (R are obtainedNA) ' and H (RNB) ', and by H (RNA) ' and H (RNB) ' broadcasted together with mission number N to all TS of the whole network, requests verification；
S2.17, the node of step 2.16 checking request is received respectively by H (RNA) ' and H (RNB) ' with preserving before in task N lists H (RNA) and H (RNB) be compared, if H (RNA) ' and H (RNA) compare unanimously, then notify CS, H (RNA) ' compare pass through, such as It is inconsistent then to notify H (RNA) ' compare do not pass through；If H (RNB) ' and H (RNB) compare unanimously, then notify CS, H (RNB) ' compare and lead to Cross, H (R are notified if inconsistentNB) ' compare do not pass through；
The checking feedback result H (R that S2.18, CS are received from multiple nodesNA) ', compare by more than threshold value, then Alice electronics Document M signature task is completed；Compare by no more than threshold value, then Alice signatures failure；CS is from testing that multiple nodes are received Demonstrate,prove feedback result H (RNB) ', compare by the signature task completion more than threshold value, then Bob electronic documents M；Compare by not surpassing Threshold value is crossed, then Bob signatures failure；
S2.19, Alice and Bob electronic document M signature task are completed, then are signed successfully, and CS is downloaded from arbitrary node TS and compiled Number for N task form HC M、HC IDA、HC IDB、AdTQ、H(RNA)、H(RNB) and AdJQ, and M ', IDA’、IDB’。
2. a kind of electronic document based on block chain and intelligent contract according to claim 1 signs method, it is characterized in that Described each block chain intelligence contract script server JS is that the default script being deployed on network performs the server of code, As the intelligent contract script on block chain, the input of predetermined format can be received, and after qualified input is received, completed Computing is exported.
3. a kind of electronic document based on block chain and intelligent contract according to claim 1 signs method, it is characterized in that In described step S1.3, CS, TS and JS are SHA256 algorithms using unified Hash operation rule.
4. a kind of electronic document based on block chain and intelligent contract according to claim 1 signs method, it is characterized in that In described step S2.1, unique identity information XAIt is that can carry out the information of real name identity examination ＆ verification, including：ID card No., Passport number or social security number, communication information PAIncluding cell-phone number, address, fax and E-mail address.
5. a kind of electronic document based on block chain and intelligent contract according to claim 1 signs method, it is characterized in that In described step S2.3, CS is by HC M、HC IDA、HC IDBUse private key PrKcAfter signature, together with mission number N, to all areas of the whole network Block chain node server TS is broadcasted, request response；Accordingly in step S2.5, determining the block chain node server TS of response makes With CS public key PuKCValidation task N signature is correct.
6. a kind of electronic document based on block chain and intelligent contract according to claim 1 signs method, it is characterized in that In described step S2.5, determine that the block chain node server TS of response uses respective private key to HC M、HC IDA、HC IDBCarry out After signature, CS is replied to as response message together with mission number N and the address of oneself；Accordingly in step S2.6, CS is connecing A progress signature verification is randomly choosed in all TS received response, signature is correct then by block chain node server TS It is used as the node TQ that has the right.
7. a kind of electronic document based on block chain and intelligent contract according to claim 1 or 6 signs method, its feature That all TS received response is ranked up by CS according to the time in described step S2.6, and select at first reach and The correct block chain node server TS of signature verification is used as the node TQ that has the right.
8. a kind of electronic document based on block chain and intelligent contract according to claim 1 signs method, it is characterized in that In described step S2.11, the node TQ that has the right is by HC M、XA、PA、XB、PBUse private key PrKTQAfter signature, compiled together with sole task Number N and TQ address AdTQIt is sent to JQ address AdJQ；In the step S2.12 of correspondence, the server JQ that has the right receives information, makes With TQ public key PuKTQSignature verification.
9. a kind of electronic document based on block chain and intelligent contract according to claim 1 signs method, it is characterized in that In described step S2.12, the server JQ that has the right receives information, judges HC M、XA、PA、XB、PBPattern of the input whether with it is default Regular consistent, format error then feeds back to TQ, and task termination, form unanimously then continues.
10. a kind of electronic document based on block chain and intelligent contract according to claim 1 signs method, it is characterized in that Described this method also includes verification step, and when Bob needs whether checking electronic document M is signed by Bob, then step is as follows：
S3.1, Bob log in checking request of the CS propositions to electronic document M；
S3.2, CS provide HC M、HC IDB、H(RNB) downloaded for Bob, and Hash operation instrument is provided；
S3.3, CS submit to number the checking request of Bob in task of being N to any TS nodes；
S3.4, receive step 3.3 request node according to the Ad recorded in numbering N tasksJQAddress, Bob checking is reported to JQ Request；
S3.5, JQ receive Bob checking requirement, and R is extracted from the assignment database that numbering is NNBAnd send to PB；
S3.6, Bob hold parameter M, XB、PB、RNBAnd HC M、HC IDB、H(RNB), Bob is using Hash operation instrument respectively to M, (XB +PB)、RNBCarry out Hash operation, and respectively with HC M、HC IDB、H(RNB) be compared, compare consistent then checking and complete, numbering is N Signature task completed by Bob, compare inconsistent then authentication failed, the non-Bob of the signature task that numbering is N is completed.
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