智能电网中基于代理盲签密的隐私保护方案

doi:10.19678/j.issn.1000-3428.0065322

摘要/Abstract

摘要： 在智能电网中，电力和信息在用户节点和服务节点间的双向流通属性给用户数据的隐私安全带来巨大威胁，同时电力局计算资源的限制也给用户带来响应延迟、服务质量下降等问题。结合边缘计算技术，提出一种基于无证书的不使用双线性映射的代理盲签密方案，通过对电力和信息的盲化，使签密者无法得知用户的具体用电信息，确保用户的数据隐私安全。使用代理密钥更新机制实现前向安全性，并对用户的签密密文进行批量验证。在随机谕言机模型下，基于计算性Diffie-Hellman问题和椭圆曲线上的离散对数问题，证明该方案在适应性选择密文攻击下的机密性，以及在适应性选择明文攻击下的不可伪造性，能够为智能电网中传输的数据隐私提供安全保护。在MIRACL库上的仿真实验结果表明，该方案在执行代理授权和验证、代理密钥生成、签密、解签密算法时所花费的总运行时间为5.616 ms，密文长度为80 Byte，与现有其他文献中的文案相比，最多能分别降低85.7%、85%。

关键词: 智能电网, 边缘计算, 无证书代理盲签密, 前向安全, 批量验证

Abstract: In smart grids，the bidirectional flow of electricity and information between user nodes and service nodes poses a significant threat to the privacy and security of user data.Meanwhile，the power bureau has limited computing resources，burdening the user with issues such as response delay and service quality degradation.A pairing-free proxy blind signcryption scheme based on certificateless cryptography combined with edge computing is proposed.This scheme makes the signcryptor blind to user-specific information by blinding the power and information，ensuring user privacy and data security.Through the proxy key update mechanism，this scheme achieves forward security and provides batch verification for the user's ciphertext.In addition，based on the computational Diffie-Hellman problem and the discrete logarithm problem on elliptic curve cryptography，the confidentiality of this scheme under adaptive chosen ciphertext attack and its unforgeability under adaptive chosen plaintext attack are proved under the random oracle model.Hence，this scheme provides security protection and privacy of data transmitted through a smart grid.Finally，the proposed scheme is simulated by using the MIRACL library.The total running time of the proposed scheme for performing proxy authorization and verification，proxy key generation，and encryption/decryption is 5.616 ms，with a ciphertext length of 80 Byte.Compared to the results of previous studies，it can reduce the running time by up to 85.7% and 85%.

Key words: smart grids, edge computing, certificateless proxy blind signcryption, forward security, batch verification

中图分类号:

TP309

王翊丞, 郭瑞, 蒙彤, 刘颖菲. 智能电网中基于代理盲签密的隐私保护方案[J]. 计算机工程, 2023, 49(5): 150-164.

WANG Yicheng, GUO Rui, MENG Tong, LIU Yingfei. Privacy Protection Scheme Based on Proxy Blind Signcryption in Smart Grid[J]. Computer Engineering, 2023, 49(5): 150-164.

http://www.ecice06.com/CN/Y2023/V49/I5/150

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