Hybrid denoising power consumption analysis method for cryptographic algorithm and terminal

Abstract

The invention relates to a hybrid denoising power consumption analysis method for a cryptographic algorithm and a terminal, and belongs to the field of information security and side channel attack. The method comprises the following steps: selecting an actual intermediate value attack point, determining a required actual intermediate value, inputting a plaintext into encryption equipment running acryptographic algorithm, and acquiring power consumption signal data during encryption; preprocessing the obtained power consumption signal data by using a denoising method of mixing low-pass filtering and an empirical mode threshold to obtain denoised power consumption signal data; constructing an actual power consumption matrix by using the preprocessed power consumption signal data, and calculating an assumed intermediate value to obtain an assumed power consumption matrix; and calculating a correlation coefficient between the actual power consumption matrix and the assumed power consumption matrix, and obtaining a correct key. According to the invention, the noise in the power consumption signal is reduced, the signal-to-noise ratio is increased, and the efficiency and accuracy of password attack are improved.

Description

technical field [0001] The invention belongs to the technical field of information security and side channel analysis, and in particular relates to a hybrid denoising power analysis method and a terminal for cryptographic algorithms. Background technique [0002] Today, the development of cryptography has significantly improved the security of encryption algorithms. It is difficult for traditional mathematical attack methods to effectively attack current encryption algorithms such as AES; however, the emergence of side-channel attacks has enabled AES to resist traditional mathematical The analyzed encryption algorithm has been compromised. Side channel attack is a non-intrusive attack method. During the process of running the encryption algorithm, the cryptographic chip will leak some energy and electromagnetic radiation through the side channel. The side channel attack uses the information leaked from these side channels. Profiling is a form of side-channel attack in which...

AI Technical Summary

Problems solved by technology

These single power consumption signal denoising methods have limited effect on noise suppression and improvement in the accuracy of power consumption analysis.

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