Application method of Hamming distance model on SM4 cryptographic algorithm lateral information channel energy analysis and based on S box input

Abstract

The invention discloses an application method of a Hamming distance model on SM4 cryptographic algorithm lateral information channel energy analysis and based on S box input. The application method is characterized in that the Hamming distance model is established by selecting an S box or a round function as an attacking point in the process that the SM4 cryptographic algorithm lateral information channel energy analysis is carried out, the input of the S box is used as an initial state v1 of the Hamming distance model, the output of the S box is used as subsequent state v2 of the Hamming distance (HD (v1, v2)) model when the S box is attacked, and the output / input of the round function is used as the subsequent state v2 of the Hamming distance (HD (v1, v2)) model when the round function is attacked. The method can be applied to CPA / DPA lateral information channel energy analysis of the SM4 cryptographic algorithm. Correlation between a correct guess secret key and energy information is improved, and validity and success rate of the analysis are enhanced.

Description

technical field [0001] The invention belongs to the technical field of cryptographic algorithm analysis and detection, and specifically relates to performing side channel energy analysis on a cryptographic module implementing the SM4 cryptographic algorithm in the process of cryptographic algorithm implementation, side channel energy analysis, and cryptographic module detection to obtain protected cryptographic data. The energy analysis method of the key information, that is, the application of the Hamming distance model based on the S-box input to the side channel energy analysis of the SM4 cipher algorithm. Background technique [0002] With the development of information technology, various cryptographic algorithms are being widely used in economic, military, administrative and other important departments to protect the security of information. In view of the importance of cryptographic algorithms, the analysis and research of cryptographic algorithm software and hardware...

AI Technical Summary

Problems solved by technology

These methods only use typical analysis points, and cannot fully and effectively analyze the SM4 cryptographic algorithm

In addition, when there is little energy leakage information available at the above analysis points, it will affect the success rate of SM4 cryptographic algorithm analysis

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