A side channel signal preprocessing method based on short time domain analysis

A technology of side channel and domain analysis, which is applied in electrical digital data processing, secure communication devices, countermeasures against encryption mechanisms, etc. Effect

Active Publication Date: 2019-01-15
成都三零嘉微电子有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the invention is to propose a universal side-channel signal pre-processing method in view of the shortcomings of the current side-channel signal preprocessing method that is not flexible enough and requires a large number of parameter configurations, which effectively improves the performance of side-channel attacks. s efficiency

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  • A side channel signal preprocessing method based on short time domain analysis
  • A side channel signal preprocessing method based on short time domain analysis

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[0014] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0015] The short-term analysis technology is mainly used to process voice signals. Its basic principle is to process non-stationary signals with a smooth signal processing method. Although the side channel signal has time-varying characteristics, due to the charging and discharging of the capacitor, in a short time range, The basic characteristics remain basically unchanged, so the side-channel signal also has short-term stability. Analog analysis can know that it is completely feasible to use the short-term analysis technique to preprocess the side-channel signal.

[0016] Common short-term processing methods include short-term average energy analysis, short-term average amplitude analysis, short-term zero-crossing detection and other basic methods. The pres...

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Abstract

A side channel signal preprocessing method based on short time domain analysis, includes setting up basic environment of collecting side channel signal, setting current sampling frequency of oscilloscope as f, setting clock frequency of cryptographic equipment as fs, setting operating frequency of cryptographic equipment as the number of points of collected side channel signal as M, number of pieces as N, and making signal matrix as TN*M, 2, determining the size of the window used for selecting the window function, wherein the size of the window is in units of the running clock of the cryptographic device, and the size of the window is calculated as follows: the size of the window is set as n, n=f/fs; (3) analyzing the short-time energy of the signal matrix according to the size n of the window until the calculation of each row of the signal matrix is completed; (4) after the short-time energy analysis of all rows of the matrix is completed, the new matrix T 'is obtained. The invention(1) the method for running the pretreatment can effectively improve the efficiency of the side channel attack; (2) the side channel signal is compressed effectively, which shortens the time of attackdetection.

Description

Technical field [0001] The invention relates to the field of chip security attack detection, in particular to a side channel signal preprocessing method based on short-time domain analysis. Background technique [0002] Traditional cryptanalysis focuses on the mathematical characteristics of the cryptographic algorithm itself, while ignoring the physical signals leaked by the cryptographic device during the operation of the cryptographic algorithm. Since Paul Kochers first proposed the idea of ​​using time to analyze sensitive information in cryptographic devices in 1996, side channel analysis has received great attention, and related research has become an important branch of cryptography research and has been widely used in cryptography. The attack detection area of ​​the chip. The basic principle of the side-channel attack is to collect the energy information or electromagnetic information of the cryptographic equipment during the operation, and then recover the key informati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/55H04L9/00
CPCG06F21/556H04L9/002
Inventor 饶金涛李军李雨励王明东何卫国夏浩然
Owner 成都三零嘉微电子有限公司
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