摘要
当前电力交易系统可采用区块链方式实现.为保证该实现方式中用户隐私保护且交易可监管,本文提出可监管的电力区块链交易隐私保护系统.使用Pedersen同态承诺隐藏交易金额,共识节点能够更新售电方的金额承诺而不知道明文金额,实现金额隐私保护.使用Diffie-Hellman协议实现随机数生成,用于对交易信息进行对称加密,实现交易数据保密性.购电方、售电方和监管方均能基于各自的私钥计算随机数种子,实现对称解密.使得用户能够进行公开电价交易,减少买卖双方可能因信息不对称而导致其中一方经济损失的问题.对用户的交易金额信息进行隐私保护,且对用电时间和地址信息等实现保密性.能够保证监管机构解密交易金额和其他交易保密信息,对交易实现严格监管,防止恶意交易、无效交易等情况发生.
The current power trading system can be realized by using blockchain.In order to protect users’privacy and ensure that transactions can be supervised,a supervised power blockchain transaction privacy protection system is proposed in this paper.The proposed system uses the Pedersen homomorphic commitment to hide the transaction amount,and consensus nodes can update the amount commitment of the power seller without knowing the explicit amount,thus realizing the privacy protection of the amount.In addition,the Diffie-Hellman protocol is used to realize random number generation,which is used to encrypt the transaction information to realize transaction of confidential data.Furthermore,the buyer,the seller and the supervisor can calculate the random number seed based on their private keys,respectively.Thus,it realizes a symmetric decryption.The system enables users to conduct public electricity price transactions,reducing the problem that buyers and sellers may suffer economic losses due to information asymmetry.In addition,the system can protect the privacy of the user’s transaction amount,realize the confidentiality of the time and address of electricity consumption.The system can ensure that the supervisor can decrypt the transaction amount and other confidential information of the transaction,enable strict supervision of the transaction,and prevent the occurrence of malicious transactions,invalid transactions and other abnormal situations.
作者
李智虎
钟林
许海清
常方圆
王妮娜
郑春莹
赵兵
LI Zhi-Hu;ZHONG Lin;XU Hai-Qing;CHANG Fang-Yuan;WANG Ni-Na;ZHENG Chun-Ying;ZHAO Bing(China Electric Power Research Institute,Beijing 100191,China;Data Communication Science and Technology Research Institute,Beijing 100191,China;Xingtang Telecommunications Technology Co.Ltd.,Beijing 100191,China;State Grid Beijing Fengtai Power Supply Company,Beijing 100191,China)
出处
《密码学报》
CSCD
2022年第6期1014-1027,共14页
Journal of Cryptologic Research
基金
国家重点研发计划(2017YFB0802500)。
关键词
电力区块链
分布式
交易隐私保护
交易监管
power blockchain
distributed
transaction privacy protection
trading regulation
