CN107784580B - Public and private key pair-based derived centerless digital currency transaction method - Google Patents
Public and private key pair-based derived centerless digital currency transaction method Download PDFInfo
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
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- 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
- G06Q20/3829—Payment protocols; Details thereof insuring higher security of transaction involving key management
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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
- G06Q40/06—Asset management; Financial planning or analysis
Abstract
The invention relates to a centerless digital currency transaction method based on derivation of public and private key pairs, wherein a payee can scan and calculate a payee public and private key pair from a public account book according to transfer time, so that the storage of data is reduced; a new collection address is generated every time of transaction, so that the anonymity of the digital currency is enhanced; in the implicit certificate generation process, the calculation amount is only increased once by the scalar multiplication calculation of the elliptic curve, so that stronger anonymity can be easily realized; actively generating a new payee address by the transaction initiator instead of the new payee address issued by the payee; each person can only have a long-term public key, and a new public and private key pair can be calculated by the long-term public and private key pair and public information on a public account book, so that the space for storing the public and private key pair is reduced; are more difficult to analyze for trading maps.
Description
Technical Field
The invention relates to the field of digital currency, in particular to a centerless digital currency transaction method derived based on a public and private key pair.
Background
The bitcoin proposed in 2008's is the first widely spread centreless digital currency. The user uses the pseudonym in the bitcoin, and the pseudonym of the bitcoin can be related to the real identity of the user through big data analysis, the structure of a transaction diagram and other methods by utilizing public data on a blockchain.
Therefore, many documents have studied the privacy of the centerless digital currency and proposed various solutions. Some use hybrid payment methods, such as Mixcoin, Darkcoin, and Coin join, that attempt to disrupt the relationship between incoming and outgoing account numbers for anonymity.
CryptoNote utilizes ring signatures to hide the amount of a transaction or individual of a transaction. Miers et al propose Zerocoin, using a zero-knowledge proof protocol to enhance privacy of transactions. Ben-Sasson et al further use zk-SNARKs non-interactive zero knowledge proof method to propose a Zerocash scheme to realize a digital cash system with stronger anonymity and better efficiency on the basis of Zerocoin.
Of course, there are many documents and methods for anonymity study of digital currency, and the Zerocash scheme is the most anonymous digital currency system at present. These centerless digital currency privacy systems also pay some price while enhancing privacy, such as using zero knowledge proofs to increase the public ledger length of digital currency, with a corresponding decrease in system computational efficiency.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a centerless digital currency transaction method derived from public and private key pairs, which can seamlessly interface with a bitcoin, and does not require a cryptographic algorithm that requires complicated computation such as zero knowledge proof or ring signature and occupies too much book space.
The purpose of the invention is mainly realized by the following technical scheme:
a kind of no-center digital currency transaction method based on public and private key pair derivation, the public and private key pair derivation method of the said digital currency uses the way of the implicit certificate, send the implicit authentication result (s, Y) voluntarily by the paying user, said s contains the paying user's private key, said Y contains the public key of the receiving user, and imply that only the receiving user can solve out the new private key; the payee obtains a new public and private key pair according to (s, Y);
the centerless digital currency transaction method is initiated by a payment user, and a public and private key pair derivation method of the digital currency is firstly used, so that a collection user obtains a new public and private key pair; then, transferring accounts by using the new public key as an address for receiving money, wherein the transfer information comprises the amount of money, the address for receiving money and the signature of a payment user on the transaction; finally, the receiving user uses the new private key to confirm the transfer result; and use the new private key as a signature for consuming the collection.
Further, the new public key is subjected to hash function calculation once and then is used as an address for receiving money.
Further, the numberPublic and private key Pair (PK) of a payment user before derivation of a word currency public and private key pairA,skA) The PKAFor the public key of the paying user, the skAA private key for the paying user; the current public and private key Pair (PK) of the payeeB,skB) The PKBThe sk is the public key of the payeeBA private key of the payee; wherein PKA＝skA*G,PKB＝skBG, which is a generator of an elliptic curve;
the derivation process of the public and private key pair of the digital currency is as follows:
1) the paying user selects k E [1, n-1], wherein n is the order of the elliptic curve;
2) calculating Y as PKB+k*G；
3) Calculating e ═ H (y), H (·) as a hash function;
4) calculating s ═ e × k + skA(mod n)；
5) Payment user publication (s, Y) and PKAThen the receiving user generates a new public key PKB new＝e*Y+PKAAnd obtains a new private key sk that can be calculated only by the receiving userB new＝e*skB+s(mod n)。
Further, the process of using the public and private key pair derivation method of the digital currency to conduct digital currency transaction comprises the following steps:
step S1, Owner1 initiates a transfer to Owner 2, Owner1 uses the digital currency public and private key pair derivation method to generate an implicit authentication result (S)1,Y1) And sending the data to Owner 2;
step S2, Owner 2 based on implicit authentication result (S)1,Y1) Generating a new public and private key pair;
step S3, Owner1 transfers money by using the new public key as the address for receiving money;
in step S4, Owner 2 confirms collection of money using the generated new private key.
Further, the Owner1 has a current public and private key transfer Pair of (PK)1,sk1) And Owner 2 has a public key PKowner2；
The specific process of step S1 is as follows:
1) owner1 selects k from [1, n-1], n is the order of elliptic curve;
2) calculating Y1＝PKowner2+k*G；
3) Calculating e ═ H (Y)1)；
4) Calculating s1＝e*k+sk1(mod n)；
5) Owner1 sends(s) in the transfer transaction to Owner 21,Y1) And Owner 1's public key PK1。
Further, step S2 includes the following process:
1) owner 2 receives(s) sent by Owner11,Y1)；
2) Calculating e ═ H (Y)1)；
3) Computing collecting public key PK2＝e*Y1+PK1；
4) Calculating the collection private key sk2＝e*skowner2+s1(mod n)；
The (PK)2,sk2) Is a temporary public and private key pair used by Owner 2 in receiving Owner1 transfers, the skowner2Is the long-term private key of Owner 2.
Further, in step 3, the transfer information in the transfer process comprises the transfer amount, the money receiving address and the private key sk used by Owner11A signature for the transaction.
Further, the signature is the public key PK of Owner1 implied in the last transaction1＝e*Y0+PK0And (6) carrying out verification.
Further, after Owner 2 receives the transfer information sent by Owner1, Owner 2 uses the private key sk2Confirming the collection of money; owner 2 uses the private key sk when making the next payment using the collection2As a payment signature.
The invention has the following beneficial effects:
1) the method for constructing digital money in which a transfer person transmits to a receiver(s)1,Y1) Or may not transmit(s)1,Y1) Telling the receiver only the time of transfer because(s)1,Y1) The method can be obtained from a public account book, and a payee can scan and calculate a payee public and private key pair from the public account book according to transfer time, so that the storage can be reduced;
2) a new collection address is generated every time of transaction, so that the anonymity of the digital currency is enhanced;
3) in the implicit certificate generation process, the calculation amount is only increased once by the scalar multiplication calculation of the elliptic curve, so that stronger anonymity can be easily realized;
4) actively generating a new payee address by the transaction initiator instead of the new payee address issued by the payee;
5) each person can only have a long-term public key, and a new public and private key pair can be calculated by the long-term public and private key pair and public information on a public account book, so that the space for storing the public and private key pair is reduced;
6) are more difficult to analyze for trading maps.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
Fig. 1 is a diagram of a digital currency transaction process.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention.
The invention discloses a centerless digital currency transaction method derived based on a public and private key pair.
The public and private key pair derivation method of the digital currency comprises the following steps:
aiming at the centreless digital currency, a credible CA is not needed to issue a certificate to a user, and any credible node is not needed to exist, the implicit authentication result (s, Y) is actively sent by a paying user by using the idea of the implicit certificate, wherein the s contains a private key of the paying user, the Y contains a public key of a receiving user, and the new private key can be solved by only the receiving user; and the payee obtains a new public and private key pair according to the (s, Y).
The new public key generation process from the payer to the payee is as follows:
let user A (payer) current public and private key pair be (PK)A,skA) The PKAIs the public key of user A, the skAA private key for user A; user B (payee) has a current public and private key Pair of (PK)B,skB) The PKBIs the public key of user B, the skBA private key for user B; wherein PKA＝skA*G,PKB＝skBG, G is the generator of the elliptic curve. The process of generating the public and private key pair for the user B by the user A is as follows:
1) the user A selects k to be equal to [1, n-1], wherein n is the order of an elliptic curve;
2) calculating Y as PKB+k*G；
3) Calculating e ═ H (y), the H (·) hash function;
4) calculating s ═ e × k + skA(mod n)。
In the above process, e is a temporary variable, and (s, Y) is a result of implicit authentication, which corresponds to the user a issuing a signed certificate to the user B. s contains the private key of user A, and Y contains the public key of user B, implying the identity of user B, implying that only user B can solve out a new private key.
5) User A publishes (s, Y) and PK to user BAUser B obtains a new public key PKB new＝e*Y+PKAAnd only the user B can calculate the corresponding new private key skB new＝e*skB+s(mod n)。
The transaction method of the centerless digital currency has stronger privacy when the transaction method of the centerless digital currency is used for carrying out digital currency transaction.
The public and private key pair derivation method of the digital currency is used for carrying out digital currency transaction, and the method is initiated by a payment user, and the public and private key pair derivation method of the digital currency is firstly used, so that a collection user obtains a new public and private key pair; then, transferring accounts by using the new public key as an address for receiving money, wherein the transfer information comprises the amount of money, the address for receiving money and the signature of a payment user on the transaction; and finally, the receiving user confirms the transfer result by using the new private key. As shown in fig. 1, the transaction process includes the following steps:
step S1, Owner1 initiates a transfer to Owner 2, Owner1 uses the digital currency public and private key pair derivation method to generate an implicit authentication result (S)1,Y1) And sending the data to Owner 2;
the current transfer public and private key pair of Owner1 is (PK)1,sk1) And Owner 2 has a public key PKowner2The specific process of initiating the transfer is as follows:
1) owner1 selects k from [1, n-1], n is the order of elliptic curve;
2) calculating Y1＝PKowner2+k*G；
3) Calculating e ═ H (Y)1)；
4) Calculating s1＝e*k+sk1(mod n)；
5) Owner1 sends(s) in the transfer transaction to Owner 21,Y1) And the public key PK1 of Owner 1.
Step S2, Owner 2 based on implicit authentication result (S)1,Y1) Generating a new public and private key pair;
the specific process is as follows:
1) owner 2 receives(s) sent by Owner11,Y1)；
2) Calculating e ═ H (Y)1)；
3) Computing collecting public key PK2＝e*Y1+PK1；
4) Calculating the collection private key sk2＝e*skowner2+s1(mod n)；
The (PK)2,sk2) Is a temporary public and private key pair used by Owner 2 in receiving Owner1 transfers, the skowner2Is the long-term private key of Owner 2.
Owner1 sends(s) to Owner 21,Y1) Or may not transmit(s)1,Y1) Just noticeIt is sufficient to resort to Owner 2 transfer time because(s)1,Y1) Can be obtained from public ledgers.
Step S3, Owner1 transfers money by using the new public key as the address for receiving money;
the transfer information in the transfer process comprises transfer amount, money receiving address and private key sk used by Owner11A signature for the transaction; the signature is a public key PK of Owner1 implicit in the last transaction1＝e*Y0+PK0And (6) carrying out verification.
Step S4, Owner 2 confirms collection by using the generated new private key;
after Owner 2 receives the transfer information sent by Owner1, Owner 2 uses the private key sk2Confirming the collection of money; owner 2 uses the private key sk when making the next payment using the collection2As a payment signature.
In summary, in the centerless digital currency construction method disclosed in this embodiment, the payee can scan and calculate a collection public and private key pair from the public account book according to the transfer time, so that the storage can be reduced; a new collection address is generated every time of transaction, so that the anonymity of the digital currency is enhanced; in the implicit certificate generation process, the calculation amount is only increased once by the scalar multiplication calculation of the elliptic curve, so that stronger anonymity can be easily realized; actively generating a new payee address by the transaction initiator instead of the new payee address issued by the payee; each person can only have a long-term public key, and a new public and private key pair can be calculated by the long-term public and private key pair and public information on a public account book, so that the space for storing the public and private key pair is reduced; are more difficult to analyze for trading maps.
Those skilled in the art will appreciate that all or part of the flow of the method implementing the above embodiments may be implemented by a computer program, which is stored in a computer readable storage medium, to instruct related hardware. The computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (9)
1. A centerless digital currency transaction method based on public and private key pair derivation is characterized in that,
the digital currency transaction method uses an implicit certificate mode, a payer actively sends an implicit authentication result (s, Y), wherein the s contains a private key of the payer, the Y contains a public key of a payee, and only the payee can solve a new private key implicitly; the payee obtains a new public and private key pair according to (s, Y);
the centerless digital currency transaction method is initiated by a payment user, and a public and private key pair derivation method of the digital currency is firstly used, so that a collection user obtains a new public and private key pair; then, transferring accounts by using the new public key as an address for receiving money, wherein the transfer information comprises the amount of money, the address for receiving money and the signature of a payment user on the transaction; finally, the receiving user uses the new private key to confirm the transfer result; and use the new private key as a signature for consuming the collection.
2. The transaction method according to claim 1, wherein said new public key is subjected to a hash function calculation and then used as an address for receiving money.
3. The transaction method according to claim 1 or 2,
the public and private key pair of the payment user before the derivation of the public and private key pair of the digital currency is (PK)A,skA) The PKAFor the public key of the paying user, the skAA private key for the paying user; the current public and private key Pair (PK) of the payeeB,skB) The PKBThe sk is the public key of the payeeBA private key of the payee; wherein PKA＝skA*G,PKB＝skBG, which is a generator of an elliptic curve;
the derivation process of the public and private key pair of the digital currency is as follows:
1) the paying user selects k E [1, n-1], wherein n is the order of the elliptic curve;
2) calculating Y as PKB+k*G；
3) Calculating e ═ H (y), H (·) as a hash function;
4) calculating s ═ e × k + skA(mod n)；
5) Payment user publication (s, Y) and PKAThen the receiving user generates a new public key PKB new＝e*Y+PKAAnd obtains a new private key sk that can be calculated only by the receiving userB new＝e*skB+s(mod n)。
4. The transaction method according to claim 1, wherein performing a digital currency transaction process using the digital currency public-private key pair derivation method comprises the steps of:
step S1, Owner1 initiates a transfer to Owner 2, Owner1 uses the digital currency public and private key pair derivation method to generate an implicit authentication result (S)1,Y1) And sending the data to Owner 2;
step S2, Owner 2 based on implicit authentication result (S)1,Y1) Generating a new public and private key pair;
step S3, Owner1 transfers money by using the new public key as the address for receiving money;
in step S4, Owner 2 confirms collection of money using the generated new private key.
5. The transaction method according to claim 4,
the current transfer public and private key pair of Owner1 is (PK)1,sk1) And Owner 2 has a public key PKowner2；
The specific process of step S1 is as follows:
1) owner1 selects k from [1, n-1], n is the order of elliptic curve;
2) computingY1＝PKowner2+k*G；
3) Calculating e ═ H (Y)1)；
4) Calculating s1＝e*k+sk1(mod n)；
5) Owner1 sends(s) in the transfer transaction to Owner 21,Y1) And Owner 1's public key PK1。
6. The transaction method according to claim 4,
step S2 includes the following processes:
1) owner 2 receives(s) sent by Owner11,Y1)；
2) Calculating e ═ H (Y)1)；
3) Computing collecting public key PK2＝e*Y1+PK1；
4) Calculating the collection private key sk2＝e*skowner2+s1(mod n)；
The (PK)2,sk2) Is a temporary public and private key pair used by Owner 2 in receiving Owner1 transfers, the skowner2Is the long-term private key of Owner 2.
7. The transaction method according to claim 4,
in step 3, the transfer information in the transfer process comprises transfer amount, money receiving address and private key sk used by Owner11A signature for the transaction.
8. The transaction method according to claim 7,
the signature is a public key PK of Owner1 implicit in the last transaction1＝e*Y0+PK0And (6) carrying out verification.
9. The transaction method according to claim 4,
after Owner 2 receives the transfer information sent by Owner1, Owner 2 uses the private key sk2Confirming the collection of money; owner 2 uses the private key sk when the next payment is made using the collection2As a payment signature.
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| 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 |
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| CN109285073B (en) * | 2018-09-29 | 2022-03-04 | 数字钱包（北京）科技有限公司 | Digital currency transaction method and device |
| CN109981289B (en) * | 2019-03-26 | 2020-03-31 | 电子科技大学 | Batch authentication method of elliptic curve digital signature algorithm under implicit certificate |
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