Anti-dismantling detection and protection circuit, implementation method and anti-dismantling chip

Abstract

The invention discloses an anti-dismantling detection and protection circuit, an implementation method and an anti-dismantling chip. The anti-dismantling detection and protection circuit includes a dynamic data generating module, a dynamic sampling module, a dynamic sampling detection module and an output module; the data generating module is used for generating dynamic data, and outputting the dynamic data to one end of each housing wound wire; the dynamic sampling module is used for collecting data from the other ends of the housing wound wires; the dynamic sampling detection module is connected with the dynamic data generating module and the dynamic sampling module, and is used for comparing the dynamic data outputted by the dynamic data generating module with the data collected by thedynamic sampling module, and outputting a comparison result; the output module is connected with the dynamic sampling detection module and is used for outputting total alarm signals when the comparison result outputted by the dynamic sampling detection module indicates that the dynamic data outputted by the dynamic data generating module are different from the data collected by the dynamic sampling module. According to the anti-dismantling detection and protection circuit provided by the embodiments of the invention, dynamic data are outputted, so that the security of anti-dismantling detection and protection can be improved.

Description

technical field [0001] The invention relates to the field of tamper detection, in particular to a tamper detection protection circuit, a realization method and a tamper chip. Background technique [0002] With the rapid development of the Internet and electronic terminal products, various means of dismantling attacks against security terminals emerge in an endless stream. The anti-dismantlement function of security chips and security terminals has become an important performance indicator of today's security systems. [0003] The general principle of the traditional static anti-tamper circuit is to use multiple metal wires to surround the terminal shell, and each metal wire transmits a fixed value. Generally, it is connected to the power supply (VCC) or ground (GND) to indicate logic "1" or "0", and the detection logic value Correctness means that the metal wires are well connected; if the logic values ​​are not equal, it means that the casing winding is damaged and an alarm...

AI Technical Summary

Problems solved by technology

[0007] However, the tamper detection circuit of the existing design has technical defects such as fixed logic value of the metal wire and low safety:

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