High-performance GFN masking method for enhancing anti-attack capability

Abstract

The invention discloses a high-performance GFN masking method for enhancing the anti-attack capability, and the method achieves the comprehensive protection on an S box, key expansion and an encryption / decryption data path, wherein each item can resist second-order energy attacks, and the anti-attack capability is higher on the whole. According to the mask S box, the S box only needs to be generated once in advance, the key expansion and encryption / decryption data paths can share the S box, an additional multiplication circuit does not need to be added to calculate intermediate data, and the hardware area and the power consumption overhead can be greatly reduced. Intermediate data in round operation are protected by different random masks all the time, and the problem of energy leakage caused by real intermediate value information is avoided in the mask processing process no matter for key expansion or for encryption / decryption of a data path. According to the invention, the number of extra registers is effectively reduced, the application is more flexible, the logic control is simple, and a large amount of hardware resources can be saved and the cost is reduced on the basis of greatly enhancing the differential power consumption attack resistance and the related power consumption attack resistance.

Description

technical field [0001] The invention discloses a high-performance GFN masking method with enhanced anti-attack capability, belongs to the technical field of information security chip design, and is applicable to a generalized Feistel structure cryptographic algorithm. Background technique [0002] With the rapid development of science and technology, the degree of informatization is gradually improving, and information security is becoming more and more important. Encryption technology guarantees information security in terms of mathematical algorithms. Compared with software implementation, hardware implementation, especially integrated circuits, has a higher degree of security. [0003] With the development of IC analysis technology, the security of chips is also subject to more and more challenges. Side channel attack (SCA) poses a serious security threat to information security products because of its low cost and high efficiency. Side-channel attacks are divided into...

AI Technical Summary

Problems solved by technology

At present, most of the existing masking methods are aimed at a specific single algorithm, and it is difficult to balance the anti-attack ability and implementation cost.

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