A fast protection method against timing and cache side channel attacks in Klein encrypted AVR environment

Abstract

The invention discloses a rapid protection method for resisting timing and cache side channel attack under a KLEIN encryption AVR environment. The rapid protection method comprises the following steps that S1, input 4 bits are converted into a Boolean operation equation set of output 4 bits through algebra standard form conversion; S2, bit values which are output in the S1 step are grouped according to bytes, total 8 bytes exist, and two bytes are in ring shift left and are output to a next step; S3, the output from the S2 step is subjected to bit slicing linear diffusion operation, the output is final output of a KLEIN round function and is taken as an input value of the next round S1; S4, the steps S1, S2 and S3 are repeated aiming at different KLEIN secret key lengths until a corresponding complete encryption output value is obtained. According to the rapid protection method, a Timing boundary channel attack mode, a Cache boundary channel attack mode and the like are defended by a KLEIN algorithm through a bit slicing mode; meanwhile, corresponding majorization is carried out respectively on the basis of reading and storage operations, and the computation complexity of the algorithm on a MixNibbles step is thus reduced.

Description

technical field [0001] The invention relates to the technical field of cryptographic algorithms, in particular to a fast protection method against timing and cache side channel attacks under the KLEIN encrypted AVR environment. Background technique [0002] With the continuous development of Internet of Things (Internet of Things) applications, related information security issues have also received more and more attention. Lightweight cryptography algorithms, especially lightweight block cipher algorithms, play a very important role in the security of the Internet of Things because they can ensure the confidentiality and integrity of data in a low-power environment. Due to the maturity of cryptographic algorithm analysis and design technology, traditional cryptographic analysis methods often pose little actual threat to related applications, but attackers can attack through boundary channel information generated in energy, time or storage. Often more threatening. [0003] ...

AI Technical Summary

Problems solved by technology

In the published literature and patents, there is no anti-timing or Cache boundary channel attack implementation for KLEIN

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