CN107784580A - A kind of non-stop layer digital cash method of commerce derived from based on public private key pair - Google Patents

A kind of non-stop layer digital cash method of commerce derived from based on public private key pair Download PDF

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CN107784580A
CN107784580A CN201710835706.3A CN201710835706A CN107784580A CN 107784580 A CN107784580 A CN 107784580A CN 201710835706 A CN201710835706 A CN 201710835706A CN 107784580 A CN107784580 A CN 107784580A
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private key
owner
public
user
key pair
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CN107784580B (en
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林齐平
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XINGTANG COMMUNICATIONS CO Ltd
Data Communication Institute Of Science And Technology
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XINGTANG COMMUNICATIONS CO Ltd
Data Communication Institute Of Science And Technology
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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
    • G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
    • G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
    • 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
    • G06Q20/3825—Use of electronic signatures
    • 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
    • G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
    • G06Q40/06—Asset management; Financial planning or analysis

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Abstract

The present invention relates to a kind of non-stop layer digital cash method of commerce derived from based on public private key pair, payee can calculate gathering public private key pair according to the time of transferring accounts from scanning on open account book, reduce the storage of data；The all newly-generated new gathering address of transaction every time, enhance the anonymity of digital cash；Amount of calculation only increases an Elliptic Curve Scalar Multiplication and calculated in implicit certificate generating process, can easily realize stronger anonymity；New gathering address, rather than the new gathering address issued by payee are actively generated by transaction initiator；Everyone can only possess a long-term public key, and new public private key pair can be calculated by the open message on long-term public private key pair and open account book, reduce the space of storage public private key pair；Compare and feel bad transaction map analysis.

Description

A kind of non-stop layer digital cash method of commerce derived from based on public private key pair
Technical field
The present invention relates to digital cash field, more particularly to a kind of non-stop layer digital cash derived from based on public private key pair to hand over Easy method.
Background technology
It is the non-stop layer digital cash of first wide-scale distribution in the bit coin that the end of the year 2008 proposed.The user in bit coin What is used is all pseudonym, analyzed using the public data on block chain by big data, the structure of trading pattern and other method can So that the pseudonym of bit coin and the true identity of user are connected.
Therefore many documents are studied the privacy of non-stop layer digital cash later, it is proposed that various solutions Scheme.Some uses mixed payment method, such as Mixcoin, Darkcoin and Coin join, and these methods attempt to upset input Relation between output account is to obtain anonymity.
CryptoNote is individual to hide number of deals or transaction using ring signatures.Miers etc. proposes Zerocoin, uses Zero knowledge probative agreement with strengthen transaction privacy.Ben-Sasson etc. further uses zk- on the basis of Zerocoin SNARKs non-interactive zero-knowledge proofs method proposes that Zerocash schemes realize anonymity and the stronger more preferable digital cash of efficiency System.
Certainly, there are many documents and method for the anonymous Journal of Sex Research of digital cash, Zerocash schemes are to hide at present The most strong digital coin systems of name property.These non-stop layer digital cash privacy systems have also paid one while privacy is strengthened A little costs, for example zero-knowledge proof is used so that the open account book length of digital cash adds, simultaneity factor computational efficiency Correspondingly reduce many.
The content of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of non-stop layer digital cash transaction derived from based on public private key pair Method, can be with bit coin slitless connection, it is not necessary to which zero-knowledge proof or ring signatures etc. calculate complicated and need to take too much The cryptographic algorithm in account book space.
The purpose of the present invention is mainly achieved through the following technical solutions：
A kind of non-stop layer digital cash method of commerce derived from based on public private key pair, the digital cash public private key pair are derived from Method uses the mode of implicit certificate, actively sends implicit authentication result (s, Y) by the user that pays the bill, the s contains payment user Private key, the Y contains the public key of gathering user, and implicit only gathering user can solve new private key；Collect money user One new public private key pair is obtained according to (s, Y)；
The non-stop layer digital cash method of commerce is initiated by the user that pays the bill, first using the digital cash public private key pair Derived method, gathering user is set to obtain a new public private key pair；Then entered using the new public key as the address for receiving fund Row is transferred accounts, and transfer information includes the amount of money, reception fund address and signature of the user to the transaction of paying the bill；Finally by the user that collects money Using the new private key, transfer result is confirmed；And the new private key is used as the signature for consuming this gathering.
Further, the new public key is carried out after a hash function calculates again as the address for receiving fund.
Further, the public private key pair of the payment user before the digital cash public private key pair derives from is (PKA,skA), it is described PKAFor the public key for the user that pays the bill, the skAFor the private key for the user that pays the bill；The current public private key pair of user of collecting money is (PKB,skB), The PKBFor the public key for the user that collects money, the skBFor the private key for the user that collects money；Wherein PKA=skA*G,PKB=skB* G, the G For the generation member of elliptic curve；
The digital cash public private key pair derivation history is as follows：
1) user that pays the bill chooses k ∈ [1, n-1], and n is the rank of elliptic curve；
2) Y=PK is calculatedB+k*G；
3) e=H (Y) is calculated, H () is hash function；
4) s=e*k+sk is calculatedA(mod n)；
5) payment user discloses (s, Y) and PKA, then collect money one new public key PK of user's generationB new=e*Y+PKA, and obtain The new private key sk that only gathering user can calculateB new=e*skB+s(mod n)。
Further, carrying out digital cash process of exchange using the digital cash public private key pair derived method includes following step Suddenly：
Step S1, Owner 1 initiates to transfer accounts to Owner 2, and Owner 1 uses the digital cash public private key pair derivation side Method, produce implicit authentication result (s1,Y1), it is sent to Owner 2；
Step S2, Owner 2 is according to implicit authentication result (s1,Y1) the new public private key pair of generation；
Step S3, Owner 1 is transferred accounts using the new public key as the address for receiving fund；
Step S4, Owner 2 confirms gathering using the new private key of generation.
Further, the current public private key pair of transferring accounts of the Owner1 is (PK1,sk1), and Owner 2 open public key is PKowner2；
The detailed process of the step S1 is as follows：
1) Owner 1 first chooses k ∈ [1, n-1], and n is the rank of elliptic curve；
2) Y is calculated1=PKowner2+k*G；
3) e=H (Y are calculated1)；
4) s is calculated1=e*k+sk1(mod n)；
5) Owner 1 sends the (s in money transfer transactions to Owner 21,Y1) and Owner 1 public key PK1。
Further, step S2 includes following process：
1) Owner 2 receives the (s that Owner 1 is sent1,Y1)；
2) e=H (Y are calculated1)；
3) gathering public key PK is calculated2=e*Y1+PK1；
4) gathering private key sk is calculated2=e*skowner2+s1(mod n)；
(the PK2,sk2) for Owner 2 receive Owner 1 transfer accounts when interim public private key pair, the skowner2For Owner 2 long-term private.
Further, in step 3, transfer information in the transfer procedure includes transfer amounts, receive fund address and Owner 1 uses private key sk1To the signature of the transaction.
Further, the signature is the public key PK of the Owner 1 by being implied in a upper transaction1=e*Y0+PK0Carry out Checking.
Further, after Owner 2 receives the transmission transfer informations of Owner 1, Owner 2 uses the private key sk2To gathering Confirmed；Owner 2 uses the private key sk when carrying out next record payment using the gathering2Signed as payment.
The present invention has the beneficial effect that：
1) people that transferred accounts in the digital cash building method needs to send (s to payee1,Y1), (s can not also be sent1, Y1), the time for only telling payee to transfer accounts, because (s1,Y1) can be obtained from open account book, payee can be according to transferring accounts Time calculates gathering public private key pair from scanning on open account book, can so reduce storage；
2) each all newly-generated new gathering address of transaction, the anonymity of digital cash is enhanced；
3) amount of calculation only increases an Elliptic Curve Scalar Multiplication calculating in implicit certificate generating process, can easily realize more Strong anonymity；
4) new gathering address, rather than the new gathering address issued by payee are actively generated by transaction initiator；
5) everyone can only possess a long-term public key, and new public private key pair can by long-term public private key pair and openly Open message on account book is calculated, and reduces the space of storage public private key pair；
6) compare and feel bad transaction map analysis.
Brief description of the drawings
Accompanying drawing is only used for showing the purpose of specific embodiment, and is not considered as limitation of the present invention, in whole accompanying drawing In, identical reference symbol represents identical part.
Fig. 1 is digital cash process of exchange figure.
Embodiment
The preferred embodiments of the present invention are specifically described below in conjunction with the accompanying drawings, wherein, accompanying drawing forms the application part, and It is used for the principle for explaining the present invention together with embodiments of the present invention.
The specific embodiment of the present invention, disclose a kind of non-stop layer digital cash transaction derived from based on public private key pair Method.
The digital cash public private key pair derived method：
In the present invention, it is directed to non-stop layer digital cash, it is not necessary to a believable CA gives user's certificate, Do not need any believable node to exist, using the thought of implicit certificate, by the user that pays the bill actively send implicit authentication result (s, Y), the s contains the private key of payment user, and the Y contains the public key of gathering user, and implicit only gathering user can solve Go out new private key；Gathering user obtains a new public private key pair according to (s, Y).
New public key generating process from payment user to gathering user is as follows：
User A if (payment user) current public private key pair is (PKA,skA), the PKAIt is described for user A public key skAFor user A private key；User B (gathering user) current public private key pair is (PKB,skB), the PKBFor user B public affairs Key, the skBFor user B private key；Wherein PKA=skA*G,PKB=skB* G, G are the generation member of elliptic curve.User A is to use Family B generations public private key pair process is as follows：
1) user A chooses k ∈ [1, n-1], and n is the rank of elliptic curve；
2) Y=PK is calculatedB+k*G；
3) e=H (Y), the H () hash function are calculated；
4) s=e*k+sk is calculatedA(mod n)。
Wherein, e is temporary variable in said process, and (s, Y) is the result of implicit authentication, is issued equivalent to user A to user B Signing certificate is sent out.S contains user A private key, and Y contains user B public key, implies user B identity, implies and only uses Family B can solve new private key.
5) user A discloses (s, Y) and PK to user BA, it is PK that user B, which obtains a new public key,B new=e*Y+PKA, and only It is sk to have user B to calculate corresponding new private keyB new=e*skB+s(mod n)。
The method of commerce of the non-stop layer digital cash, the privacy that this method carries out digital cash transaction are stronger.
Digital cash transaction is carried out using above-mentioned digital cash public private key pair derived method, user initiates by paying the bill, and first makes With the digital cash public private key pair derived method, gathering user is set to obtain a new public private key pair；Then the new public affairs are used Key is transferred accounts as the address for receiving fund, and transfer information includes the amount of money, reception fund address and payment user and the pen is handed over Easy signature；The new private key is finally used by the user that collects money, confirms transfer result.As shown in figure 1, process of exchange is including as follows Step：
Step S1, Owner 1 initiates to transfer accounts to Owner 2, and Owner 1 uses the digital cash public private key pair derivation side Method, produce implicit authentication result (s1,Y1), it is sent to Owner 2；
The current public private key pair of transferring accounts of the Owner1 is (PK1,sk1), and Owner 2 open public key is PKowner2, The initiation detailed process of transferring accounts is as follows：
1) Owner 1 first chooses k ∈ [1, n-1], and n is the rank of elliptic curve；
2) Y is calculated1=PKowner2+k*G；
3) e=H (Y are calculated1)；
4) s is calculated1=e*k+sk1(mod n)；
5) Owner 1 sends the (s in money transfer transactions to Owner 21,Y1) and Owner 1 public key PK1.
Step S2, Owner 2 is according to implicit authentication result (s1,Y1) the new public private key pair of generation；
Detailed process is as follows：
1) Owner 2 receives the (s that Owner 1 is sent1,Y1)；
2) e=H (Y are calculated1)；
3) gathering public key PK is calculated2=e*Y1+PK1；
4) gathering private key sk is calculated2=e*skowner2+s1(mod n)；
(the PK2,sk2) for Owner 2 receive Owner 1 transfer accounts when interim public private key pair, the skowner2For Owner 2 long-term private.
Owner 1 sends (s to Owner 21,Y1), (s can not also be sent1,Y1), only tell Owner 2 to transfer accounts the time With regard to much of that, because (s1,Y1) can be obtained from open account book.
Step S3, Owner 1 is transferred accounts using the new public key as the address for receiving fund；
Transfer information in the transfer procedure includes transfer amounts, reception fund address and Owner 1 and uses private key sk1 To the signature of the transaction；The signature is the public key PK of the Owner 1 by being implied in a upper transaction1=e*Y0+PK0Carry out Checking.
Step S4, Owner 2 confirms gathering using the new private key of generation；
After Owner 2 receives the transmission transfer informations of Owner 1, Owner 2 uses the private key sk2Gathering is carried out true Recognize；Owner 2 uses the private key sk when carrying out next record payment using the gathering2Signed as payment.
In summary, the non-stop layer digital cash building method disclosed in the present embodiment, when payee can be according to transferring accounts Between from open account book scanning calculate gathering public private key pair, can so reduce storage；All newly-generated one of transaction is new every time Gathering address, enhance the anonymity of digital cash；Amount of calculation only increases an elliptic curve mark in implicit certificate generating process Amount multiplies calculating, can easily realize stronger anonymity；New gathering address is actively generated by transaction initiator, rather than by collecting money The new gathering address of people's issue；Everyone can only possess a long-term public key, and new public private key pair can be by long-term public and private Open message on key pair and open account book is calculated, and reduces the space of storage public private key pair；Compare and feel bad trading pattern point Analysis.
It will be understood by those skilled in the art that realizing all or part of flow of above-described embodiment method, meter can be passed through Calculation machine program instructs the hardware of correlation to complete, and described program can be stored in computer-readable recording medium.Wherein, institute Computer-readable recording medium is stated as disk, CD, read-only memory or random access memory etc..
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in, It should all be included within the scope of the present invention.

Claims (9)

  1. A kind of 1. non-stop layer digital cash method of commerce derived from based on public private key pair, it is characterised in that
    The digital cash public private key pair derived method uses the mode of implicit certificate, and by paying the bill, user actively sends implicit authentication As a result (s, Y), the s contain the private key of payment user, and the Y contains the public key of gathering user, and implicit only gathering user New private key can be solved；Gathering user obtains a new public private key pair according to (s, Y)；
    The non-stop layer digital cash method of commerce is initiated by the user that pays the bill, and is first derived from using the digital cash public private key pair Method, gathering user is set to obtain a new public private key pair；Then turned using the new public key as the address for receiving fund Account, transfer information includes the amount of money, reception fund address and signature of the user to the transaction of paying the bill；Finally used by the user that collects money The new private key, confirm transfer result；And the new private key is used as the signature for consuming this gathering.
  2. 2. method of commerce according to claim 1 a, it is characterised in that hash function is carried out to the new public key and calculated Afterwards again as the address for receiving fund.
  3. 3. method of commerce according to claim 1 or 2, it is characterised in that
    The public private key pair of payment user before the digital cash public private key pair derivation is (PKA,skA), the PKAUsed for payment The public key at family, the skAFor the private key for the user that pays the bill；The current public private key pair of user of collecting money is (PKB,skB), the PKBTo receive The public key of money user, the skBFor the private key for the user that collects money；Wherein PKA=skA*G,PKB=skB* G, the G are elliptic curve Generation member；
    The digital cash public private key pair derivation history is as follows：
    1) user that pays the bill chooses k ∈ [1, n-1], and n is the rank of elliptic curve；
    2) Y=PK is calculatedB+k*G；
    3) e=H (Y) is calculated, H () is hash function；
    4) s=e*k+sk is calculatedA(mod n)；
    5) payment user discloses (s, Y) and PKA, then collect money one new public key PK of user's generationB new=e*Y+PKA, and only had The new private key sk that gathering user can calculateB new=e*skB+s(mod n)。
  4. 4. method of commerce according to claim 1, it is characterised in that use the digital cash public private key pair derived method Digital cash process of exchange is carried out to comprise the following steps：
    Step S1, Owner 1 initiates to transfer accounts to Owner 2, and Owner 1 uses the digital cash public private key pair derived method, Produce implicit authentication result (s1,Y1), it is sent to Owner 2；
    Step S2, Owner 2 is according to implicit authentication result (s1,Y1) the new public private key pair of generation；
    Step S3, Owner 1 is transferred accounts using the new public key as the address for receiving fund；
    Step S4, Owner 2 confirms gathering using the new private key of generation.
  5. 5. method of commerce according to claim 4, it is characterised in that
    The current public private key pair of transferring accounts of the Owner1 is (PK1,sk1), and Owner 2 open public key is PKowner2；
    The detailed process of the step S1 is as follows：
    1) Owner 1 first chooses k ∈ [1, n-1], and n is the rank of elliptic curve；
    2) Y is calculated1=PKowner2+k*G；
    3) e=H (Y are calculated1)；
    4) s is calculated1=e*k+sk1(mod n)；
    5) Owner 1 sends the (s in money transfer transactions to Owner 21,Y1) and Owner 1 public key PK1。
  6. 6. method of commerce according to claim 4, it is characterised in that
    Step S2 includes following process：
    1) Owner 2 receives the (s that Owner 1 is sent1,Y1)；
    2) e=H (Y are calculated1)；
    3) gathering public key PK is calculated2=e*Y1+PK1；
    4) gathering private key sk is calculated2=e*skowner2+s1(mod n)；
    (the PK2,sk2) for Owner 2 receive Owner 1 transfer accounts when interim public private key pair, the skowner2For Owner 2 long-term private.
  7. 7. method of commerce according to claim 4, it is characterised in that
    In step 3, the transfer information in the transfer procedure includes transfer amounts, reception fund address and Owner 1 and uses private Key sk1To the signature of the transaction.
  8. 8. method of commerce according to claim 7, it is characterised in that
    The signature is the public key PK of the Owner 1 by being implied in a upper transaction1=e*Y0+PK0Verified.
  9. 9. method of commerce according to claim 4, it is characterised in that
    After Owner 2 receives the transmission transfer informations of Owner 1, Owner 2 uses the private key sk2Gathering is confirmed； Owner 2 uses the private key sk when carrying out next record payment using the gathering2Signed as payment.
CN201710835706.3A 2017-09-15 2017-09-15 Public and private key pair-based derived centerless digital currency transaction method Active CN107784580B (en)

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CN108805538A (en) * 2018-06-14 2018-11-13 清华大学 A kind of digital cash method of commerce and device
CN108898490A (en) * 2018-06-25 2018-11-27 北京奇虎科技有限公司 Execution method, node, system, electronic equipment and the storage medium of intelligent contract
CN108985760A (en) * 2018-06-15 2018-12-11 杭州复杂美科技有限公司 Method of payment and system, equipment and storage medium
CN109118363A (en) * 2018-08-14 2019-01-01 中钞信用卡产业发展有限公司杭州区块链技术研究院 Digital cash wallet address management method, device and equipment based on block chain
CN109285073A (en) * 2018-09-29 2019-01-29 数字钱包（北京）科技有限公司 Digital cash method of commerce and device
CN109978518A (en) * 2019-03-27 2019-07-05 数据通信科学技术研究所 A kind of implicit certificate distribution method and system
CN109981289A (en) * 2019-03-26 2019-07-05 电子科技大学 Batch authentication method of elliptic curve digital signature algorithm under implicit certificate
WO2020258832A1 (en) * 2019-06-26 2020-12-30 创新先进技术有限公司 Anonymous transaction method and apparatus based on ring signature
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CN113438072A (en) * 2021-06-09 2021-09-24 北京理工大学 Block chain covert communication method based on derived chain
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