RC4 hardware circuit mark protection method and system

Abstract

The present invention provides a RC4 hardware circuit mark protection method and system. The method comprises: the secret key inputting and S box grouping step: performing grouping with the same number of the inputted secret keys and the S boxes, introducing random numbers to the inputted secret keys and the S boxes at the same time, wherein the inputted secret keys and the S boxes are subjected to grouping, the sum of each part is the same as the content of the inputted secret keys and the S boxes which don't have protection; the S box initial permutation step: performing initial permutation of the grouping S boxes according to the grouping inputted secret keys; and the secret key stream generation step: performing permutation once again of the grouping S boxes after the initial permutation, and taking the sum of the grouping S boxes after the permutation once again as a new index, wherein the content of the X boxes pointed by the new index is an output secret key stream. Through adoption of the algorithm level defensive measure, the RC4 hardware circuit mark protection method and system quote random numbers to take as masks to resist to the power consumption attack, especially the template attack aiming at the RC4.

Description

technical field [0001] The invention belongs to the technical field of cryptographic algorithm protection, and in particular relates to an RC4 hardware circuit mask protection method and system. Background technique [0002] In today's world, the computer network represented by the Internet has been rapidly developed and widely used, and e-commerce, e-government, and e-finance based on the computer network are booming. Therefore, network security and information security have become issues of concern to people. Many encryption algorithms are also born. Among them, RC4 has been widely used in security modules in many fields because of its easy implementation, fast encryption speed, good randomness and ability to resist various analysis. [0003] In the internationally renowned security protocol standard SSL / TLS (Secure Socket Protocol / Transport Layer Security Protocol), the RC4 algorithm is used to protect the confidentiality of Internet transmission. In the WEP protocol as...

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Problems solved by technology

[0004] With the popularity of computer networks, the traditional RC4 software encryption method has become increasingly unable to meet daily needs, and its limitations have gradually been exposed

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