基于区块链的身份托管模型研究

针对现有中心化信任下用户多身份管理难的问题，提出一种基于区块链的身份托管模型。模型将用户拥有的各个系统的身份信息采用椭圆曲线算法加密签名，确保身份信息的所有权；设计了身份认证区块链模型和身份信息上链的智能合约，将身份签名结果存储到区块链中，确保其安全和不可篡改；设计了登录验证的智能合约，使用用户公钥对签名信息验证用户是否具有登录系统的权限。对该区块链身份托管模型在Hyperledger Fabric中进行实验论证，实验结果表明，该模型具有高的安全性和时间效率，能方便管理用户的多个系统身份信息。

Research on Identity Trusteeship Model Based on Blockchain

In order to solve the problem of user’s multi-identity trusteeship under the existing centralized trust system,this paper proposes an identity trusteeship model based on blockchain.Firstly,it encrypts the identity information of each system owned by the user by elliptic curve signature algorithm to ensure the ownership of the identity information.Then,it designs an identity authentication blockchain storing model and a smart contract of storing identity information,which stores the identity signature result in blockchain and ensures that it is secure and non-tampering.Finally,it designs a smart contract for login verification,which verifies whether the user has the permission to login the system by user’s public key.A simulation experiment is done in Hyperledger Fabric in order to make a demonstration for the proposed model and test its performance.The experimental results show that the proposed model has high security and time efficiency,and can conveniently manage multiple system identity information for users.