关键词: 区块链, 身份管理, 去中心化, 椭圆曲线算法, 智能合约

Abstract:

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.

Key words: blockchain, identity trusteeship, decentralized, elliptic curve algorithm, smart contract