Anti-attack method and circuit implementation based on dynamically changing the storage location of intermediate data

Abstract

The invention discloses an anti-attack method based on the middle data storage position dynamic change, and circuit implementation. Obtaining of an assumed power consumption value is damaged, so that power consumption attacking is resisted; the positions of registers where DES algorithm middle data are stored are dynamically changed when the DES algorithm operates, and middle data of every two adjacent rounds are stored in different registers, so that power analysis attacking based on a hamming distance model is effectively resisted. The method is high in flexibility, small in area cost and high in power consumption attaching resistance. Meanwhile, the method has very high expansibility, can be used for resisting other potential attacking points in the algorithm, and can be well transplanted to other cryptographic algorithms. A very good solution and a very good design method are provided for designing a cryptographic chip which is high in security and capable of effectively resisting power consumption attacking.

Description

technical field [0001] The invention relates to the technical field of integrated circuit hardware implementation and information security, in particular to an anti-power consumption attack method for DES (Data Encryption Standard) cryptographic algorithm hardware circuits. Background technique [0002] With the increasing informatization, digitalization and networking of modern society, information security products represented by cryptographic equipment have penetrated into all aspects of national security and people's lives. Cryptographic products can be realized by software, but hardware-based cryptographic devices have become a research hotspot because hardware implementation has a faster speed than software implementation. Various encryption chips based on DES (Data Encryption Standard, Data Encryption Standard), AES (Advanced Encryption Standard, Advanced Encryption Standard), RSA and other algorithms have been extensively researched and developed. [0003] Cryptogra...

AI Technical Summary

Problems solved by technology

When the basic circuit unit maintains a fixed state, the energy consumption of the circuit is small, and there is only a small amount of static power consumption; when the basic unit flips from "0" to "1", or from "1" to "0", the circuit The middle transistor will be turned on instantaneously, resulting in dynamic power consumption with large power consumption

It can be seen that the power consumption of digital circuits mainly comes from the state transition of the circuit, and does not depend on the data itself, and the more devices that are flipped, the greater the power consumption

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