Research On Muti-signature Using Blockchain

With the development of electronic information technology,contracts are increasingly being signed over the Internet.Both parties can sign the contract through the form of electronic signature,which is authenticated by the third party.However,a fully trusted third party isn't guaranteed in reality,so the safety and stability of third-party institutions has become an important research direction.Since the blockchain can not be tampered with,decentralized,transparent and open,and at the same time using cryptography technology and consensus mechanism to make the data in the block reach agreement in a distributed environment.At the same time,it uses cryptography technology and consensus mechanism to make the data in the block reach agreement in a distributed environment.It has achieved breakthroughs in some traditional business models.Changes include e-commerce and government services.In the consortium chain of a certain number of groups,multiple pre-selected nodes designate the bookkeeper and jointly determine the signing and generation of blocks in the chain.Hyperledger is the first project based on the alliance chain,which is widely used in different business scenarios and has greatly changed the face of various industries.this paple intregates the blockchain to improve the ordered multi-signature and proxy multi-signature system,and proposes two safe and effective schemes.This paper studies the orderly multi-signature technology,the fair exchange technology of the penalty mechanism and the blockchain technology.Since the currently proposed signature schemes are used by the signing user to verify the validity of the signature file,the overall signature time is too long.In order to solve the efficiency problem of signature verification,the use of smart contracts can effectively reduce the time consumption of signature verification.At the same time,in order to ensure the fairness of the signature process,a penalty mechanism was introduced.The scheme combines blockchain technology with an orderly multi-signature scheme,which not only improves the efficiency of the signer's signature,but also ensures that the signature process is completely transparent.Based on the difficulty of calculating the Diffie-Hellman problem,the scheme in this paper is provably secure.Through theoretical analysis and prototype realization,the designed scheme is safe and efficient.This paper also studies proxy multi-signature technology and blockchain technology.This solution uses the feature of the blockchain to be tamper-proof,effectively solve the problems of low signature efficiency and inability to trace.At the same time,it uses smart contracts to complete the partial work during the signature process,reducing the user's computing cost.This solution meets proposed security requirements,compared with the existing solution,the computational efficiency is improved.the solution is built in the local private chain and the system is implemented,compared with the existing proxy system solution,it is built in the private chain,making the transaction traceable,and at the same time part of the signer's work is done by the deployed smart contract,reducing the signer's computing cost.