CN109447634A - A kind of code key update method and block chain account management method using this method of locking an account - Google Patents
A kind of code key update method and block chain account management method using this method of locking an account Download PDFInfo
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- CN109447634A CN109447634A CN201811171231.3A CN201811171231A CN109447634A CN 109447634 A CN109447634 A CN 109447634A CN 201811171231 A CN201811171231 A CN 201811171231A CN 109447634 A CN109447634 A CN 109447634A
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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
Abstract
It locks an account code key update method the invention discloses one kind, the Threshold key sharing algorithm based on Lagrange interpolation polynomial that the method uses belongs to linear secret sharing scheme, and key is shared to meet isomorphism: key key1(k, n) thresholding key share be (a1..., an), key key2(k, n) thresholding key share be (b1..., bn), then (a1+b1..., an+bn) it is key key1+key2(k, n) thresholding key share, if enabling key2=0, then obtain key1New (k, n) thresholding key share.The present invention is compared with current block chain account management mode, the beneficial effect is that, space consuming is low, consistent with ordinary numbers signature occupied space, easily takes low, limitization, with compared with high fault tolerance, therefore stability is high, and success rate is high, capacitive is high, and any account for taking ECDSA signature algorithm this programme can be used to be managed.
Description
Technical field
The invention belongs to block chain technical fields, more particularly, to a kind of signature generating method and using the block of this method
Chain account management method.
Background technique
Block chain be it is a kind of data block is combined into specific data structure in a manner of chain sequentially in time, and
General ledger is shared in the decentralization that can not be distorted He can not forge that is guaranteed in a manner of cryptography, can secure storage is simple, has
Precedence relationship, the data that can be verified in system.
Block chain has been applied to the multiple fields such as finance, medical treatment, education at present.Intelligent contract will be written in it using logic
In, it is then deployed on block chain.User sends a transaction to intelligent contract by its block chain account, triggers in contract
Logic executes corresponding operating, is finally completed practical business.Therefore account management is for block chain using extremely important.And
In some special scenes, multiple main bodys is needed to manage some account jointly, it is desirable that these main bodys possess identical control to account
Power, the main body participation for only meeting condition quantity can control account and send licit traffic, and single main body can not accomplish.
In order to realize that the target of multi-agent system account, a series of technologies are suggested.There are space occupancies for these technologies
High, versatility is not strong, participates in the defects of main body needs real-time online.This programme is one based on the block chain account pipe calculated in many ways
Reason method is equal to space occupancy with single main body account, has very strong versatility, and realize the " thresholding of account management
Change ", the online requirement of main body need to be participated in by reducing.Limit.
There are two types of the way to manages of current block chain multiagent account:
Multi-signature
Account executive and multiple client public key are bound, it is desirable to provide the corresponding digital signature of all these public keys is
It being capable of unlocking account.Detailed process:
1. the presenter that trades constructs transaction, it is then broadcast to other management subjects
2. after other receive transaction, being signed with the private key of oneself, and be broadcasted
3. being configured to complete to trade to send Schnorr signature after a main body is collected into all signatures
Basic thought is the public key by the public key " synthesis " of participant for a totality, and then each participant utilizes oneself
Private key make signature after, then this signature synthesized into overall signature, matched with overall public key.
The technical disadvantages of multi-signature:
1. space occupancy is high
2. transaction fee is high
3. poor fault tolerance, as long as soon as participant is not online, it is unable to complete signature.
4. poor compatibility does not support the block chain of intelligent contract or multi-signature script not to be available Schnorr signature
Technical disadvantages:
1. poor compatibility does not support ECDSA
2. all participants must be online simultaneously, poor fault tolerance.
Summary of the invention
In order to make up the defect on above-mentioned block chain account management, the present invention proposes a kind of block chain based on multi-party operation
Account management method.
Its technical solution are as follows: one kind locks an account code key update method, the method use based on Lagrange's interpolation
Polynomial Threshold key sharing algorithm belongs to linear secret sharing scheme, and key is shared to meet isomorphism: key key1's
(k, n) thresholding key share is (a1..., an), key key2(k, n) thresholding key share be (b1..., bn), then (a1+
b1..., an+bn) it is key key1+key2(k, n) thresholding key share, if enabling key2=0, then obtain key1It is new
(k, n) thresholding key share, specific steps include
Node PiRandom number polynomial is selected, 0 is shared, and calculate share (fi(1) ..., fi(n))；
Node PiBy safe lane by fi(j) it is sent to Pj, j=1 ..., n；
After all transmissions, node PiReceive information (f1(i) ..., fn(i)), then PiNew key share are as follows:
A kind of block chain account management method, the account management method further include lock an account generating algorithm and locking account
Family signature algorithm.
Further, the method also includes aided algorithm, the aided algorithm includes the multi-party algorithm of multiplication, step
Include:
PiGenerate a random k-1 order polynomial hi(x), it is desirable that meet hi(0)=αiβi,
PiCalculate hi(j) it is sent to Pj, 1≤j≤2k-1,
Each participant PiIt collects other participants and is sent to its secret shadow, finally calculateH (i) is PiThe secret shadow of the secret α β of acquisition.
Further, the aided algorithm further includes the multi-party computational algorithm that unitary is inverted, and step includes:
PiSelect random number ri, and select random number polynomial gi(x) its secret shadow r is calculatedij=gi(j) it is sent to participation
Person Pj, i≤j≤n,
PjAfter receiving all secret shadows, calculate
Using the multi-party computational algorithm of multiplication, the secret shadow f of α r is calculated by the secret shadow of α and rαr(i), and
α r is recovered,
Enable m=α r, γi=fα -1(i)=m-1r′i, as PiThe α of grasp-1Secret shadow.
The present invention compared with current block chain account management mode, the beneficial effect is that, space consuming is low, and common
Digital signature occupied space is consistent, easily takes low, limitization, has compared with high fault tolerance, therefore stability is high, and success rate is high, and capacitive is high,
Any account for taking ECDSA signature algorithm this programme can be used to be managed.
Specific embodiment
The present invention is described further below in conjunction with embodiment
The authentication of block chain account is completed by digital signature, and the algorithm taken is based on elliptic curve
ECDSA signature.Therefore the core of block chain account management is exactly the generating mode of digital signature.It is poor that this programme is based on Lagrange
It is worth multinomial secret-sharing algorithm, is calculated in conjunction with multi-party, the thresholding of ECDSA signature algorithm is completed, to reach block chain
The target that account manages in many ways improves the credibility and fault-tolerance of account management.Hereinafter, take this programme generate and
The account of management is referred to as locking an account.
Entire scheme includes three core algorithms: the generating algorithm that locks an account, the signature algorithm that locks an account, lock an account it is close
Key more new algorithm and three aided algorithms: the multi-party computational algorithm of addition, multi-party computational algorithm, the unitary of multiplication are inverted
Multi-party computational algorithm.
(1) aided algorithm
α, β are the company secret shared by Lagrangian differential polynomial secret-sharing algorithm, by the secret shadow of α, β
It is as follows to calculate alpha+beta secret shadow algorithm:
Input: the secret shadow α of secret α, βi、βi；
Output: the secret shadow γ of secret alpha+betai；
γi=αi+βi。
α, β are the company secret shared by Lagrangian differential polynomial secret-sharing algorithm,
It is as follows that α β secret shadow algorithm is calculated by the secret shadow of α, β:
Input: the secret shadow α of secret α, βi、βi,
Output: the secret shadow γ of secret α βi,
PiGenerate a random k-1 order polynomial hi(x), it is desirable that meet hi(0)=αiβi,
PiCalculate hi(j) it is sent to Pj, 1≤j≤2k-1,
Each participant PiIt collects other participants and is sent to its secret shadow, finally calculateH (i) is PiThe secret shadow of the secret α β of acquisition.
α is the company secret shared by Lagrangian differential polynomial secret-sharing algorithm, is calculated by the secret shadow of α
α-1Secret shadow algorithm is as follows:
Input: the secret shadow α of secret αi,
Output: secret α-1Secret shadow γi,
PiSelect random number ri, and select random number polynomial gi(x) its secret shadow r is calculatedij=gi(j) it is sent to participation
Person Pj, 1≤j≤n,
PjAfter receiving all secret shadows, calculate
Using the multi-party computational algorithm of multiplication, the secret shadow f of α r is calculated by the secret shadow of α and rαr(i), and
α r is recovered,
Enable m=α r, γi=fα -1(i)=m-1r′i, as PiThe α of grasp-1Secret shadow.
(2) core algorithm
Lock an account generating algorithm
The generation scheme that locks an account is the improvement of the thresholding key managing project based on Lagrange interpolation polynomial.It
Basic ideas are by threshold secret Share, and all verifying nodes are generated jointly in a manner of decentralization and locked an account, and
Each verifying node knows a share of the private key that locks an account.This ensure that the private key that locks an account is with private key part
This distributed form of volume is present in whole network, thus can decentralization management.
The generating algorithm that locks an account includes:
PiSelect random number di, by diG broadcasts the whole network；
PiSelect k-1 order polynomial: fi(x)=di+aI, 1x+…+aI, k-1xk-1, by fi(j) it is transferred to by safe lane
Pj, while by aI, 1G……aI, k-1G broadcasts the whole network；
PjTo PiAfter information, verified:If verifying does not pass through, reject, requests Pi
Retransmit information；
After all information are all sent and are verified, the key share of each user is
S=1 ..., n；
(k, n) thresholding locks an account address as address=Hash (Q), whereinCorresponding private key isThis private key can only be restored by k parts or more key share.
Lock an account signature algorithm
Sign in generating process locking an account, be different from original ECDSA signature algorithm, account private key and random number be with
In many ways the form calculated participates in ECDSA signature process；The signature-verification process that locks an account and original ECDSA signature verification are calculated
Method is identical.Therefore the generating process of signing that locks an account only is introduced, the signature algorithm that locks an account includes:
It participates in node and calculates shared random number c, P using multi-partyiRandom number share be ci；
PiCalculate Ri=ciG, and broadcast Ri；
After each node broadcasts, PiIt calculatesR=x mod p, whereinParticipate in section
Point PiC is calculated using invert multi-party computational algorithm of unitary-1Share ωi；
Utilize ωiAnd ti, by the multi-party computational algorithm of multiplication, c is calculated-1The share v of di, wherein d is the private that locks an account
Key, tiFor the private key share that locks an account；
After calculating, PiCalculate si=ωim+viR, siAs participant PiSignature share, PiIt is broadcasted；
PiCalculate verifying Rj=uj1G+uj2Qj, whereinQj=tjG, if the verification passes,
Then receive the share s that signsj, otherwise refuse signature share sj；
PiAfter receiving k or more signature share, full signature s is restored using Lagrange's interpolation algorithm, it is final to sign
Entitled (r, s).
Lock an account key updating algorithm
It is total that the Threshold key sharing algorithm based on Lagrange interpolation polynomial used in this programme belongs to linear key
Mechanism is enjoyed, therefore key is shared and meets isomorphism: key key1(k, n) thresholding key share be (a1..., an), key key2
(k, n) thresholding key share be (b1..., bn), then (a1+b1..., an+bn) it is key key1+key2(k, n) thresholding it is close
Key share.If enabling key2=0, then we can obtain key1New (k, n) thresholding key share, the locking account
Family more new algorithm includes:
Node PiRandom number polynomial is selected, 0 is shared, and calculate share (fi(1) ..., fi(n))；
Node PiBy safe lane by fi(j) it is sent to Pj, j=1 ..., n；
After all transmissions, node PiReceive information (f1(i) ..., fn(i)), then PiNew key share are as follows:
The present invention compared with current block chain account management mode, the beneficial effect is that, space consuming is low, and common
Digital signature occupied space is consistent, easily takes low, limitization, has compared with high fault tolerance, therefore stability is high, and success rate is high, and capacitive is high,
Any account for taking ECDSA signature algorithm this programme can be used to be managed.
Above-mentioned technical proposal only embodies the optimal technical scheme of technical solution of the present invention, those skilled in the art
The principle of the present invention is embodied to some variations that some of them part may be made, belongs to the scope of protection of the present invention it
It is interior.
Claims (4)
- The code key update method 1. one kind locks an account, which is characterized in that the method uses multinomial based on Lagrange's interpolation The Threshold key sharing algorithm of formula belongs to linear secret sharing scheme, and key is shared to meet isomorphism: key key1(k, n) Thresholding key share is (a1..., an), key key2(k, n) thresholding key share be (b1..., bn), then (a1+b1..., an+ bn) it is key key1+key2(k, n) thresholding key share, if enabling key2=0, then obtain key1New (k, n) thresholding it is close Key share, specific steps includeNode PiRandom number polynomial is selected, 0 is shared, and calculate share (fi(1) ..., fi(n))；Node PiBy safe lane by fi(j) it is sent to Pj, j=1 ..., n；After all transmissions, node PiReceive information (f1(i) ..., fn(i)), then PiNew key share are as follows:
- 2. a kind of block chain account management method using claim 1 the method, which is characterized in that the account management side Method further includes lock an account generating algorithm and the signature algorithm that locks an account.
- 3. block chain account management method according to claim 2, which is characterized in that the method also includes auxiliary to calculate Method, the aided algorithm include the multi-party algorithm of multiplication, and step includes:PiGenerate a random k-1 order polynomial hi(x), it is desirable that meet hi(0)=αiβi,PiCalculate hi(j) it is sent to Pj, 1≤j≤2k-1,Each participant PiIt collects other participants and is sent to its secret shadow, finally calculateH It (i) is PiThe secret shadow of the secret α β of acquisition.
- 4. block chain account management method according to claim 3, which is characterized in that the aided algorithm further includes unitary The multi-party computational algorithm inverted, step include:PiSelect random number ri, and select random number polynomial gi(x) its secret shadow r is calculatedij=gi(j) it is sent to participant Pj, 1 ≤ j≤n,PjAfter receiving all secret shadows, calculateUsing the multi-party computational algorithm of multiplication, the secret shadow f of α r is calculated by the secret shadow of α and rar(i), and restore α r out,Enable m=α r, γi=f α-1(i)=m-1r′i, as PiThe α of grasp-1Secret shadow.
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| CN109905247A (en) * | 2019-03-28 | 2019-06-18 | 郑州师范学院 | Digital signature method, device, equipment and storage medium based on block chain |
| CN111444521A (en) * | 2020-02-21 | 2020-07-24 | 成都信息工程大学 | Image secret sharing method based on threshold increase and digital signature system |
| CN111861741A (en) * | 2020-06-23 | 2020-10-30 | 广东贝莱蔻生物科技有限公司 | Supply chain creditor transfer and tracing method and system based on block chain |
| CN112118096A (en) * | 2020-09-04 | 2020-12-22 | 中国科学院大学 | Secret sharing method taking specific numerical value as share |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI737956B (en) * | 2019-01-14 | 2021-09-01 | 開曼群島商現代財富控股有限公司 | Threshold signature system based on secret sharing and method thereof |
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| CN111444521B (en) * | 2020-02-21 | 2023-09-01 | 成都信息工程大学 | Image secret sharing method based on threshold increase and digital signature system |
| CN111861741A (en) * | 2020-06-23 | 2020-10-30 | 广东贝莱蔻生物科技有限公司 | Supply chain creditor transfer and tracing method and system based on block chain |
| CN112118096A (en) * | 2020-09-04 | 2020-12-22 | 中国科学院大学 | Secret sharing method taking specific numerical value as share |
| CN112118096B (en) * | 2020-09-04 | 2023-06-27 | 中国科学院大学 | Secret sharing method taking specific numerical value as share |
| CN112906038A (en) * | 2021-03-26 | 2021-06-04 | 成都卫士通信息产业股份有限公司 | SM9 key-based thresholding method, device, equipment and storage medium |
| CN112906038B (en) * | 2021-03-26 | 2023-04-07 | 成都卫士通信息产业股份有限公司 | Thresholding processing method, device and equipment based on SM9 key and storage medium |
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Application publication date: 20190308 |