Attack method and system for side channel password energy leakage signal

Abstract

The invention provides an attack method and a system for a side channel password energy leakage signal. The method comprises the following steps: establishing an assumed energy consumption matrix andclassifying energy data by utilizing sub-key guessing; and carrying out data processing on the classification result and the energy leakage curve to obtain a statistical value, and then solving a meanvalue to obtain a discriminator value of the guessed sub-key at the time point; and judging whether all guessed sub-keys are traversed or not, and traversing the energy data at all time points; and if the abscissa corresponding to the maximum discriminator value is selected as the sub-key, comparing the sub-key with the real key to judge whether the cryptographic equipment is safe. In the attackprocess of the energy leakage signal, model assumption does not need to be carried out on the energy leakage signal, the method does not depend on any fixed or proportional model, and the real key ofthe cryptographic equipment is recovered only by analyzing the distribution characteristics of the energy leakage signal under different sub-key guessing conditions. Due to the fact that distributionof the leakage signals is directly analyzed and does not depend on a linear measurement mode, nonlinear characteristics of the energy leakage signals can be fully mined.

Description

technical field [0001] The invention relates to the technical fields of side-channel cryptanalysis, mathematical statistics and information security, in particular to an attack method and system for side-channel cipher energy leakage signals. Background technique [0002] Such as figure 1 As shown, when the cryptographic device is running the cryptographic algorithm, due to the energy characteristics of the CMOS device, the cryptographic device will always leak information related to the cryptographic algorithm. The leaked information includes but is not limited to: electromagnetic information, energy loss information, sound information, etc. Side-channel cryptanalysis uses the leaked information above and combines the key information of the discriminator to successfully crack the key information of the cryptographic algorithm, which poses a serious threat to the cryptographic equipment in the actual use process. [0003] To prevent this threat, cryptographic devices are ce...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides an attack method and system for side-channel cipher energy leakage signals, which are used to solve the problem of energy model, calculation amount and equipment limitations in the process of securely authenticating the key of a cipher device

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