A password mask method to enhance the anti-attack ability

Abstract

The present invention is a cryptographic Mask method that enhances the anti-attack capability. The encryption process includes steps: (1) introducing the original random number X, XORing the plaintext M; (2) performing an initial IP replacement, and then dividing it into two parts, L and R, And introduce the random numbers Xy and Xz generated in the middle; (3) Introduce the F function corrected by the mask, and perform n rounds of F function operations; (4) Merge the two parts of L and R, and then perform FP inverse initial replacement; (5) Introduce the original random number X, perform XOR, and get the ciphertext C. In the whole process of encryption and decryption, the present invention only uses two kinds of F-functions corrected by the mask to achieve the effect of different masks in the calculation results of adjacent rounds. The present invention only needs to realize two kinds of SM-Boxes, and Compared with other anti-CPA attack solutions, on the basis of greatly enhancing the ability to resist differential power consumption attacks and related power consumption attacks, it can also save a lot of hardware resources and reduce costs.

Description

technical field [0001] The invention relates to a cryptographic Mask method for enhancing the anti-attack ability, which is suitable for the cryptographic algorithm of Feistel structure. Background technique [0002] With the rapid development of information technology, the value of information becomes higher and higher. Correspondingly, the protection of this part of information assets is becoming more and more important. At present, the commonly used measures are software methods, but due to the proliferation of network viruses, the continuous occurrence of hacker incidents and the frequent exposure of security holes in the operating system, people have gradually lost confidence in software-based security measures. [0003] Hardware has gradually played a vital role in security systems. The basic consideration is that hardware, especially integrated circuits, has an inherently high level of security. Since the integrated circuit integrates a large number of circuits, it...

AI Technical Summary

Problems solved by technology

Currently, there are currently existing Feistel-based password Mask algorithms with masks, some of which only add masks in the first and last two rounds, and the data in the middle round is still the same as the value of the original algorithm; The horizontal XOR processing of the left and right parts, or the vertical XOR processing of the front and rear wheels can eliminate the mask

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