Research On Privacy Protection Methods Of Smart Meter User Based On Lattice-based Cryptography

As an important device in the distribution side of smart grid,smart meter undertakes the task of power collection,data sending and message receiving.In order to implement load monitoring,generation and distribution forecasting,fault detection and other functions in the smart grid,smart meters need to send real-time power consumption data of users to the grid control center periodically,and the control center also needs to send tariff information and control messages to smart meters at high frequency.However,there are security risks in transmitting the above data over public channels.By eavesdropping or hijacking messages,attackers can infer the behavior pattern of specific users and e ven tamper with their electricity consumption information,threatening the privacy and security of users and the property security of the grid.Meanwhile,with the development of quantum computers,traditional smart meter user privacy protection schemes ar e facing the threat of quantum attacks.In this paper,the following research is conducted to address the above issues(1)To address the privacy leakage and quantum attack problems faced by smart meters sending electricity consumption data,a lattice cipher-based privacy protection scheme for smart meters is proposed,which achieves anonymous transmission of electricity consumption information with quantum security.It is theoretically proved that the scheme satisfies confidentiality,integrit y,anonymity,traceability,scalability,resistance to internal attacks,and quantum security.(2)Considering the problem of inefficiency of individual entities verifying electricity consumption messages in the current smart meter user privacy protection scheme,a batch verification technique is designed to improve the traditional authentication scheme and increase the efficiency of individual entities verifying electricity consumption messages in the scheme.When the number of users is set to50,the algorithm can reduce the computational overhead by 64.3%.(3)A suitable authentication and key negotiation scheme for smart meters is proposed by combining lattice cryptography and identit y-based encryption for security issues in two-way communication between grid control centers and smart meter users.The scheme improves the traditional sc heme based on DH key exchange protocol and solves its shortcomings of inefficiency and inability to re sist quantum attacks.Meanwhile,the scheme can resist man-in-the-middle attacks,unknown key sharing attacks and known key security attacks,and has perf ect forward security and quantum security.(4)The proposed scheme in this paper is experimentally com pared and analyzed with related schemes,and the results prove that the proposed scheme in this paper has certain advantages in terms of computation overhead,storage overhead and communication overhead,and is suitable for smart meter deployment.