Safety device and anti-attack method thereof thereof

Abstract

The invention provides a safety device and an anti-attack method thereof. Firstly, a corresponding relationship between a comprehensive attack strength threshold and an anti-attack strategy is preset,and anti-attack strategies of different grades can be correspondingly set according to different comprehensive attack strength thresholds. Then at least two kinds of detection items of the safety equipment are monitored respectively to obtain the current attack times of each detection item. A comprehensive attack strength value of a security device currently attacked is determined according to the detected current attacked times of each detection item; Then, according to the relationship between the current comprehensive attack strength value and the preset comprehensive attack strength threshold and the anti-attack strategy, the anti-attack strategy matching the current comprehensive attack strength value is selected as the target anti-attack strategy, and the target anti-attack strategyis adopted to protect the security equipment. Thus, the invention can synthesize the attack strength of the current multiple attacks on the security device and call out the corresponding level anti-attack strategy to protect the security device, thereby better protecting the information security of the user.

Description

technical field [0001] The invention relates to the field of information security, in particular to a security device and an anti-attack method thereof. Background technique [0002] With the development of electronic information technology, more and more cryptographic security chips, embedded software and their security devices have been applied in fields such as finance, government affairs, and tax control. Since these security devices contain sensitive information or information related to user accounts, permissions, funds, etc., and are easily exposed to attackers, they have become vulnerable targets. In order to achieve their goals, attackers usually use a variety of attack methods, such as side channel attacks, fault injection attacks, software logic attacks, and physical intrusion attacks; taking fault injection attacks as an example, attackers usually have voltage manipulation, electromagnetic injection attacks, etc. , laser attack and many other attack implementati...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a security device and its anti-attack method to solve the problem that the existing security device uses an anti-attack strategy set based on a single attack mode to resist external attacks, resulting in poor protection performance

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