Power consumption attack method and system for DES algorithm L register flipping

Abstract

The invention discloses a power consumption attack method and system for DES algorithm L register flipping, and relates to the technical field of DES hardware module safety evaluation, and the methodcomprises the following steps: generating a 32-bit random number R through RNG, and generating a corresponding plaintext; inputting the plaintext into a hardware module with a DES algorithm for operation, collecting power consumption information during operation, generating a power consumption curve, and repeatedly executing the operation until the collected power consumption curve meets the requirement of DPA attack; calculating by utilizing plaintext and guessing keys; selecting an intermediate value corresponding to the plaintext, wherein the intermediate values of the plaintext form an intermediate data array; repeatedly calculating to obtain a plurality of intermediate data arrays corresponding to the plurality of guessing keys; respectively calculating the relevance of the pluralityof intermediate data arrays and power consumption data to find the guessing key corresponding to the intermediate data arrays with the maximum relevance. According to the DES hardware module securityassessment method and device, the SNR can be effectively improved, the DPA attack effect can be enhanced, and the security assessment accuracy of the DES hardware module can be improved.

Description

technical field [0001] The invention relates to the technical field of DES hardware module safety evaluation, in particular to a power consumption attack method and system for DES algorithm L register flipping. Background technique [0002] In 1973, the US National Bureau of Standards publicly solicited cryptographic schemes. After a lot of public discussion, the cryptographic algorithm developed by IBM was adopted as DES (Data Encryption Standard) in 1977 and authorized for use in unclassified government communications. Since its publication, DES has been active on the stage of international secure communication and has become the most commonly used encryption and decryption algorithm in commercial secure communication and computer communication. [0003] The appearance of DES is a major pioneering work in the history of encryption. The details of the previous cipher design were kept strictly confidential, while DES published all the implementation details. DES is a bloc...

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Problems solved by technology

[0013] At present, the DPA attack on the DES algorithm mainly focuses on the first round of DES operation, by randomly inputting plaintext data and then calculating the intermediate value to attack, but the power consumption information P total The proportion is low, resulting in a low signal-to-noise ratio (SNR), and the effect of the DPA attack is weak, which ultimately leads to low accuracy of the security evaluation of the DES hardware module obtained through the existing DPA attack method

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