CN115964680A - Copyright protection method based on double-authentication blocking signature and block chain - Google Patents
Copyright protection method based on double-authentication blocking signature and block chain Download PDFInfo
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Abstract
The invention discloses a copyright protection method based on double-authentication blocking signature and a block chain, which comprises the following steps: acquiring a public and private key pair of a copyright buyer and a copyright seller and a third party authority; the copyright buyer and the copyright holder comprise a copyright applicant and a copyright holder; based on the public and private key pair, the copyright applicant registers copyright to a third party authority to acquire copyright registration information; based on the copyright registration information, the copyright applicant transacts with the copyright holder through a block chain and carries out illegal action constraint on the copyright holder through a pre-deployed intelligent contract; and the supervision node protects the copyright transaction based on a preset strategy. The invention combines the double-authentication blocking signature algorithm and the block chain technology, improves the problems of high communication cost with a third-party authority and incapability of pre-defense in the traditional method, reduces the communication cost with the third-party authority, and simultaneously realizes the pre-defense.
Description
Technical Field
The invention belongs to the technical field of network space security, and particularly relates to a copyright protection method based on double-authentication blocking signature and a block chain.
Background
Copyright protection may give the original author various rights including the right to prevent illegal copying by others, promoting progress by producers and users. Unlike entity copyright protection, with the increasing number of copyright, the digital era has higher and higher requirements on copyright protection mechanisms. Protecting copyright presents many technical challenges, and the mainstream technology of traditional copyright protection is watermarking technology and digital technology. These techniques mostly achieve copyright protection by adding watermarks or digital fingerprints to files to be protected. By examining the tags added to the file, data owners can discover illegal data usage and then protect their rights by reporting to authorities and other methods.
In recent years, a block chain has been attracting attention as an emerging technology because of its reliability and transparency. The block chain technology provides a mutually trusted solution for both parties, copyright can be protected under the condition that a third party authority does not exist, and high legal and transaction costs are avoided. However, most block chain based copyright protection schemes can only be validated after the copyright owner finds himself infringed ('post-mortem penalty'), rather than blocked before the infringement occurs ('pre-defense'). Although some solutions can achieve the purpose of "pre-defense", their solutions also face limitations, such as being applicable only to digital images, etc.
Disclosure of Invention
The invention aims to provide a copyright protection method based on double-authentication blocking signature and a block chain, which aims to solve the problems in the prior art.
In order to achieve the above object, the present invention provides a copyright protection method based on dual authentication blocking signatures and block chains, comprising:
acquiring a public and private key pair of a copyright buyer and a copyright seller and a third party authority; the copyright buyer and the copyright seller comprise a copyright applicant and a copyright holder;
based on the public and private key pair, the copyright applicant registers copyright to a third party authority to acquire copyright registration information;
based on the copyright registration information, the copyright applicant transacts with the copyright holder through a block chain and carries out illegal action constraint on the copyright holder through a pre-deployed intelligent contract;
and the supervision node protects the copyright transaction based on a preset strategy.
Optionally, the process of acquiring a public-private key pair of the copyright buyer and the copyright seller and a third party authority includes:
taking the block chain transaction record as copyright certification;
and acquiring the public and private key pair by registering with a key management mechanism.
Optionally, the blockchain transaction record includes a description of the copyright des, a copyright hash value m, a chained address of copyright data, an identity ids of the copyright buyer and the copyright seller, and a double-authentication blocking signature s.
Optionally, the public-private key pair includes:
sk，pk＝g sk
the system comprises a public key, a sk, a G, a P-order cyclic group and a prime number, wherein pk is the public key of a user, sk is the private key of the user, G is a generator of G and is a public security parameter, G is the p-order cyclic group, and p is the prime number;
the buyer holds a public and private key defined as (sk) B ，pk B ) The seller has the definition of (sk) as the public and private keys S ，pk S ) The definition of the public and private keys held by the third party authority is (sk) T ，pk T ) The definition of the public and private keys held by the copyright applicant is (sk) A ，pk A )。
Optionally, the process of registering the copyright of the copyright applicant with the third party authority includes:
the copyright holder initiates a copyright application request to the third party authority; the copyright application request comprises copyright information, copyright applicant identity and other data;
the third party authority verifies the copyright application request based on a local database;
after the verification is passed, the third party authority generates transaction information, and the copyright holder and the copyright applicant sign the transaction information;
and linking the chain based on the transaction information, and taking the transaction information as an initial transaction.
Optionally, each transaction in the copyright transaction process is derived from the initial transaction.
Optionally, the process of binding the copyright holder for illegal action by the pre-deployed intelligent contract comprises:
if the copyright applicant considers that the copyright holder sells the copyright, the copyright holder creates an intelligent contract and creates a deposit in the intelligent contract, and the intelligent contract stores the deposit; the amount of the deposit is larger than the transaction amount;
and the copyright holder creates a double-authentication organization signature, and the copyright applicant verifies the double-authentication organization signature and issues the double-authentication organization signature to the block chain network.
Optionally, the double-authentication organization signature includes a zero-knowledge proof, a verifiable secret sharing parameter and a transaction, after the double-authentication organization signature is created, the copyright holder signs the transaction once, and after the copyright applicant verifies the double-authentication organization signature, the copyright applicant signs the transaction once again;
the transaction includes a description of the current owner of the copyright, a hash value of the data copyright, a linked address of the copyright, a secret sharing value, and an address in the link of the last transaction of the copyright.
Optionally, the process of the supervising node for protecting the current copyright transaction based on the predetermined policy includes:
after the copyright applicant issues the double-authentication organization signature to the blockchain network, the supervision node checks the transaction in the double-authentication organization signature based on a preset strategy, if the check is correct, the transaction amount is paid based on an intelligent contract, and a deposit is refunded; and if the supervising node finds the fraudulent behavior of the copyright holder, punishing the copyright holder based on the double-authentication organization signature.
Optionally, the manner of punishing the copyright holder based on the double-authentication organization signature is as follows:
wherein sk S Private key of copyright applicant, s 1 And s 2 Representing a double authentication tissue signature, x 1 And x 2 Respectively, the random values corresponding to the two transactions.
The invention has the technical effects that:
the invention combines the double-authentication blocking signature algorithm and the block chain technology, improves the problems of high communication cost with a third-party authority and incapability of pre-defense in the traditional method, reduces the communication cost with the third-party authority, and simultaneously realizes the pre-defense.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 is a detailed flow chart of copyright transaction in an embodiment of the present invention;
fig. 2 is a general flow chart of copyright transaction in the embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
Example one
As shown in fig. 1-2, the present embodiment provides a copyright protection method based on dual-authentication blocking signature and block chain, including:
initializing a copyright protection system to obtain a public and private key pair of a copyright buyer and a copyright seller and a third party authority;
firstly, defining the transaction record (des, m, address, ids, s) on the block chain as the copyright certification, wherein the transaction record comprises a description des of the copyright, a hash value m of the copyright, an address under the chain of the copyright data, identities ids of both transaction parties and the double-authentication blocking signature s.
The copyright protection system is initialized, when each user accesses, the user registers with the key management organization to obtain a public and private key pair issued by the key management organization: sk, pk = g sk Where pk is the public key of the user, sk is the private key of the user, G is a generator of G, which is a public security parameter shared by the whole system, G is a p-order cyclic group, where p is a prime number, and the buyer holds a public and private key pair defined as (sk) B ，pk B ) Seller is (sk) S ，pk S ) The third party authority is (sk) T ，pk T ) The copyright applicant is (sk) A ，pk A )；
Step two, based on the public and private key pair, a copyright applicant registers copyright to a third party authority;
the copyright holder initiates a copyright application request req = (m, id, info) to a third party authority. The request includes copyright information m, the identity id of the copyright applicant and other material info to prove his ownership of the copyright. After receiving the request, the third party organization verifies the request with its local database. If the verification is passed, the third party authority generates a transaction with the copyright holder on the blockchain, and the transaction represents the issuing and guarantee of the copyright on behalf of the third party authority. Both parties sign the transaction information respectively, and finally the transaction chain (initial transaction) is linked. Subsequent transactions regarding the copyright are traced back to the initial transaction.
Step 3, based on the copyright registration information, the buyer carries out transaction with the seller through a block chain, and carries out illegal action restriction on the seller through an intelligent contract deployed in advance so as to reach the state of normal ending or abnormal exit of the transaction;
in this step, the buyer wants to purchase the seller's copyright, but worry about the seller having sold the copyright to a large number of people, so the buyer asks the seller to generate a signature using the DAPS protocol. First, the seller creates an intelligent contract SC and publishes it in the blockchain. He then creates a deposit v at time t of the smart contract. The deposit should be greater than the price of the transaction data. Intelligent contract maintenance array Deposit]To store the deposit value for each account. The seller then generates a double-authentication organization signature σ. Specifically, if the seller owns the copyright m and sells it for the first time, the seller randomly picks an integer x and calculates a verifiable secret sharing value s = a x + sk s And generating a zero knowledge proof PK { (a, sk) without interaction S )：A＝g a ∧a＝H(data，sk S ) }. Where a = H (data, sk) S ) Is a parameter used for binding with copyright one by one; a = g a Is a parameter for verifiable secret sharing; sk s Is the private key of the buyer. Seller generating a transaction tx at the same time 0 = (des, hash, addr, s, pointer), including description des of the current owner of the data right, hash value hash of the data right, address addr under the chain of the right, secret share value s, and address pointer in the chain of the one transaction on the right. The seller signs the transaction and sends it to the buyer who performs zero knowledge proof and verifiable secretsAnd verifying the sharing and the signature, wherein a signature is also carried out on the transaction after the verification is passed, and the signature is issued to the blockchain network. The supervising node checks the transaction according to a predetermined policy.
And 4, protecting the copyright transaction based on the system and completing system construction.
If the transaction is successfully completed, meaning that no fraud is found in the transaction, a function in the smart contract is invoked to make payment, which transfers the currency corresponding to the bid by the buyer to the account corresponding to the seller and refunds the seller and buyer's deposit. If the transaction is interrupted midway, which means that the monitoring node finds the fraud of the seller, the seller is punished, and the punishment is carried out on the seller, wherein the punishment is realized through the corresponding double-authentication blocking signature s in the two illegal transactions found by the monitoring node 1 And s 2 The realization is as follows:
wherein x 1 And x 2 Respectively, the random values corresponding to the two transactions. The transaction is invalid, so that the safe execution of copyright transaction is ensured and the aim of defense in advance is fulfilled.
The above description is only for the preferred embodiment of the present application, but the scope of the present application 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 application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A copyright protection method based on double authentication blocking signature and block chain is characterized by comprising the following steps:
acquiring a public and private key pair of a copyright buyer and a copyright seller and a third party authority; the copyright buyer and the copyright seller comprise a copyright applicant and a copyright holder;
based on the public and private key pair, the copyright applicant registers copyright to a third party authority to acquire copyright registration information;
based on the copyright registration information, the copyright applicant transacts with the copyright holder through a block chain and carries out illegal action constraint on the copyright holder through a pre-deployed intelligent contract;
and the supervision node protects the copyright transaction based on a preset strategy.
2. The copyright protection method based on the dual certification blocking signature and the block chain as claimed in claim 1, wherein the process of acquiring the public and private key pair of the copyright buyer and seller and the third party authority comprises:
taking the block chain transaction record as a copyright certificate;
and registering the public key pair with a key management mechanism to obtain the public and private key pair.
3. The copyright protection method based on the double-certification blocking signature and the blockchain according to claim 1, wherein the blockchain transaction record includes a description of copyright des, a copyright hash value m, an address under link of copyright data, an identity ids of the copyright buyer and seller and a double-certification blocking signature s.
4. The dual authentication blocking signature and blockchain based copy protection method of claim 1, wherein the public-private key pair comprises:
sk,pk＝g sk
the system comprises a public key, a sk, a G, a P-order cyclic group and a prime number, wherein pk is the public key of a user, sk is the private key of the user, G is a generator of G and is a public security parameter, G is the p-order cyclic group, and p is the prime number;
the definition that the buyer holds the public and private keys is (sk) B ,pk B ) The seller has the definition of (sk) as the public and private keys S ,pk S ) The third party authority has the definition of (sk) of public and private keys T ,pk T ) The definition of the public and private key of the copyright applicant is (sk) A ,pk A )。
5. The method for copyright protection based on dual certification block signature and block chain according to claim 1, wherein the process of copyright applicant registering copyright to third party authority includes:
the copyright holder initiates a copyright application request to the third-party authority; the copyright application request comprises copyright information, copyright applicant identity and other data;
the third party authority verifies the copyright application request based on a local database;
after the verification is passed, the third party authority generates transaction information, and the copyright holder and the copyright applicant sign the transaction information;
and linking the chain based on the transaction information, and taking the transaction information as an initial transaction.
6. The dual authentication blocking signature and blockchain based copyright protection method of claim 5, wherein each transaction in a copyright transaction process is originated from the initial transaction.
7. The dual certificate blocking signature and blockchain based copyright protection method of claim 1, wherein the process of restricting the illegal action of the copyright holder by the intelligent contract deployed in advance comprises:
if the copyright applicant considers that the copyright holder sells the copyright, the copyright holder creates an intelligent contract and creates a deposit in the intelligent contract, and the intelligent contract stores the deposit; the amount of the deposit is larger than the transaction amount;
the copyright holder creates a double-authentication organization signature, the copyright applicant verifies the double-authentication organization signature and issues the double-authentication organization signature to a block chain network.
8. The copyright protection method based on the double-authentication blocking signature and the block chain as claimed in claim 7, wherein the double-authentication organization signature comprises zero knowledge proof, verifiable secret sharing parameters and a transaction, after the double-authentication organization signature is created, the copyright holder signs the transaction once, and after the copyright applicant verifies the double-authentication organization signature, the copyright applicant signs the transaction once again;
the transaction includes a description of the current owner of the copyright, a hash value of the data copyright, a linked address of the copyright, a secret sharing value, and an address of the last transaction of the copyright in the link.
9. The copyright protection method based on the dual authentication blocking signature and the block chain as claimed in claim 1, wherein the process of the supervising node protecting the current copyright transaction based on the predetermined policy comprises:
after the copyright applicant issues the double-authentication organization signature to the blockchain network, the supervision node checks the transaction in the double-authentication organization signature based on a preset strategy, if the check is correct, the transaction amount is paid based on an intelligent contract, and a deposit is refunded; and if the supervising node finds the fraudulent behavior of the copyright holder, punishing the copyright holder based on the double-authentication organization signature.
10. The copyright protection method based on the dual authentication blocking signature and the block chain as claimed in claim 9, wherein the copyright holder is punished based on the dual authentication organizational signature by:
wherein sk S Private key of copyright applicant, s 1 And s 2 Representing a double authentication tissue signature, x 1 And x 2 Respectively, the random values corresponding to the two transactions.
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