Password mask method for enhancing attack resistance ability

Abstract

The invention discloses a password mask method for enhancing attack resistance ability. The password mask method for enhancing the attack resistance ability includes an encryption process. The encryption process includes steps: (1) introducing an original random number X, and performing exclusive-or operation on a clear text; (2) performing IP (internet protocol) initial displacement, and then dividing the clear text into an L portion and an R portion, and furthermore introducing random numbers Xy and Xz, generated in the middle process; (3) introducing F functions amended by mask codes, and performing n turns of F function operation; (4) combining the L portion with the R portion, and then performing an FP inverse initial permutation; (5) introducing the original random number X, and performing the exclusive-or operation so as to obtain a cipher text C. The password mask method for enhancing the attack resistance ability can achieve different effects of the mask codes by only using two types of the F functions amended by the mask codes during the whole encryption and decryption process, and only needs to achieve two types of SM-Box, and compared with other schemes with CPA attack resistance, the password mask method for enhancing the attack resistance ability can save a great number of hardware resources and reduce cost on the premise of substantially enhancing differential power attack and related power consumption attack resistance.

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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