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A kind of method and device for determining beat-off point

A beat-beating and module-determining technology, applied in the field of communication, can solve the problems of no security system, etc., and achieve the effect of improving the effect and accurate alignment

Active Publication Date: 2020-10-09
AEROSPACE INFORMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no security system is absolutely reliable. There are more and more means of attacking security devices, and side channel attacks are one of them.

Method used

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  • A kind of method and device for determining beat-off point
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  • A kind of method and device for determining beat-off point

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Embodiment Construction

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0024] Before aligning the signal of the opposite side channel, it is first necessary to find the beating misalignment point of the side channel signal relative to the reference signal. In the prior art, the process of finding the beating misalignment point is generally: firstly, the reference signal and the starting point of the side channel signal Alignment, and then take a window value W and a correlation threshold E, along the two sig...

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Abstract

The invention provides a method and device for determining beat offset points. The method comprises the steps that the correlated offset points of a side channel signal can be determined by means of the set window value and the correlated threshold value; the absolute value of data difference between the side channel signal and the reference signal, starting from the correlated offset point and backtracking to the set window value, can be calculated, obtaining a difference time sequence signal; the beat offset point of the side channel signal can be determined based on the difference time sequence signal. The invention is advantageous in that during the process of aligning the side channel signal and the reference signal, the beat offset points can be accurately positioned, and thereby thealigning accuracy of the side channel signal and the reference signal can be realized, and the effect of detecting the side channel attack can be improved.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a method and device for determining the misalignment point of beats. Background technique [0002] Encryption is a very important security component for computing devices and network systems. However, no security system is absolutely reliable. At present, more and more methods of attacking security devices have emerged, and side channel attacks are one of them. [0003] Side Channel Attack (SCA), also known as Side Channel Attack, is aimed at the information leakage of time series data such as time consumption, power consumption, or electromagnetic radiation consumption of encrypted electronic devices during operation. Methods of attacking encrypted electronic devices are much more effective than mathematical methods of cryptanalysis and pose a serious threat to security devices. Therefore, the prevention of side-channel attacks is becoming more and more important. [0004] In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L9/00H04L7/00
CPCH04L7/0016H04L9/002H04L25/03012
Inventor 华刚刘海法王申
Owner AEROSPACE INFORMATION