Method for symmetric cryptographic algorithm to resist side-channel analysis

Abstract

The invention relates to a method for a symmetric cryptographic algorithm to resist side-channel analysis. The method can be used for resisting side-channel attack for a symmetric cryptographic algorithm and preventing an attacker from acquiring a computation key of the symmetric algorithm through side-channel analysis. The symmetric cryptographic algorithm can be realized by hardware and software. In the computation process, a realization carrier leaks key information of computation through a side channel, such as carrying out differential power analysis attack with the use of power consumption information in the computation process. Side-channel analysis poses a great threat to software and hardware realization security of the symmetric cryptographic algorithm. The invention provides a method for the symmetric cryptographic algorithm to resist side-channel analysis. In the whole process of symmetric cryptographic computation, no clear data known to attackers participates in computation, an intermediate result in symmetric cryptographic computation has a random mask, and the mask of each round of computation is different from masks of other rounds, which makes it extremely difficult for attackers to acquire key information from side-channel analysis and realizes protection on the key of the symmetric cryptographic algorithm.

Description

technical field [0001] The invention relates to a method for safely executing DES cipher algorithm in electronic components, in particular to a method for resisting side-channel attacks when electronic components execute DES algorithm. Background technique [0002] Symmetric cryptographic algorithms such as DES, AES, etc., which have been proved to be sufficiently safe in mathematical principles, have many security holes in the software and hardware implementation process. These security vulnerabilities are often obtained and analyzed statistically by attackers through side channels such as power consumption, computing time, and electromagnetic radiation. Side-channel analysis can measure and record side-channel information such as power consumption, time, and electromagnetic radiation in the process of cryptographic algorithm operations, and obtain key information used in cryptographic operations through mathematical calculations, which has a great impact on the security of...

AI Technical Summary

Problems solved by technology

[0002] Symmetric cryptographic algorithms such as DES, AES, etc., which have been proved to be sufficiently safe in mathematical principles, have many security loopholes in the process of software and hardware implementation.

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