Data protection method and system based on homomorphic encryption

A homomorphic encryption and data protection technology, applied in the field of information security, can solve problems such as user behavior and habits, privacy leakage, user data tampering, etc.

Active Publication Date: 2013-04-10
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI +1
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Problems solved by technology

[0012] The purpose of the present invention is to provide a data protection method and system based on homomorphic encryption to solve the problem of frequent information communication between users and energy suppliers in the existing smart grid, which may cause user behavior and Habits and other privacy leaks and user data may be tampered with

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  • Data protection method and system based on homomorphic encryption
  • Data protection method and system based on homomorphic encryption

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Embodiment 1

[0080] Please refer to Figure 4 , Figure 4 It is a schematic diagram of the principle of the homomorphic encryption-based data protection method and system of the present invention. based on Figure 4 The working principle shown can detect whether the user's consumption data in the first embodiment is tampered with by the adversary during the communication process.

[0081] S1, S2, and S3 represent three smart meter readers existing in group 1, respectively. At time n-1, the keys they use to encrypt consumption data are K1 n-1 、K2 n-1 、K3 n-1 , the readings of the smart meter reader are B1 n-1 、B2 n-1 、B3 n-1 ; At the nth moment, the keys they use to encrypt consumption data are K1 n 、K2 n 、K3 n , and the key for encrypting consumption data changes from time n-1 to time n, that is, K1 n-1 different from K1 n , the readings of the smart meter reader are B1 n 、B2 n 、B3 n . The consumption data recorded by the smart meter reader from time n-1 to time n are resp...

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Abstract

The invention provides a data protection method and a system based on homomorphic encryption. Historical data of users are combined, the data protection method and the system based on the homomorphic encryption utilizes a principle of the homomorphic encryption, methods of calibration for comparing two encrypted values after polymerizations can effectively detect whether the data of the users are intercepted or tampered by opponents or not in the process of transmitting procedure of the data of the users. The data protection method and the system based on the homomorphic encryption can find whether the data of the users are tampered or not, and carry out the deciphering on the whole encrypted consumption data of the same group identification data (ID) so that the whole consumption data of the group are obtained. The data protection method and the system based on the homomorphic encryption don't directly decipher the encrypted consumption data sent by a smart meter reading device so that the privacy disclosure of the users to energy suppliers is avoided.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a data protection method and system based on homomorphic encryption. Background technique [0002] With the development of society, many countries are committed to promoting the modernization of power grids, because it can improve energy efficiency, gradually transition to the use of new energy, reduce greenhouse gas emissions, and establish sustainable economic development. play a big role. [0003] The power grid system is a large-scale and complex system. In order to maintain the security and stability of the power grid system, network communication and information technology are widely used in the power grid system. This new hybrid network is the smart grid. [0004] Technically speaking, the smart grid is a self-healing power system based on information technology in the future. Through information technology, the current power system can be improved to make...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L9/00
Inventor 俞凯卜智勇贠超陈实王海峰
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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