Device for defending invasive attack

Abstract

The invention discloses a device for defending invasive attack. The device comprises one or more sensors, one or more metal wires, a comparator and a controller, wherein the signal transmitting end of each sensor is used for transmitting a signal, and the signal receiving end of each sensor is used for detecting the integrity of the signal; the metal wires are covered above a protected circuit and used for connecting the signal transmitting ends and the signal receiving ends of the sensors together; the input end of the comparator is respectively connected with the signal transmitting ends and the signal receiving ends of the sensors and used for comparing the signals of the signal transmitting ends and the signal receiving ends, and the output end of the comparator is connected with the data input end of an alarm mark; and the controller is used for controlling the signal update of the signal transmitting ends of the sensors, controlling the comparator to periodically detect the connectivity of the metal wires and enabling the alarm mark to be valid when the connectivity of the metal wires is abnormal. Through the device, the internal signals of an integrated circuit (IC) chip can be effectively prevented from being detected by the invasive attack, the security of user data is protected, and the security strength of the IC chip is improved.

Description

technical field [0001] The invention relates to the field of IC chip security, in particular to a device for defending against intrusive attacks, how to detect intrusive attacks, issue an alarm in time, and prompt the system to process. Background technique [0002] With the continuous expansion of the application range of IC (Integrated Circuit) chips, the security requirements for IC chips are also becoming higher and higher. At the same time, with the advancement of science and technology, IC chips that were previously thought to be highly integrated and highly secure are increasingly vulnerable to various attacks, and effective technologies must be developed to combat various possible threats. [0003] Among the various threats, intrusive attacks are a technique with a high success rate. Intrusive attacks refer to physically irreversible changes to the structure of IC chips by means of etching, laser, FIB (focused ion beam), etc., so that internal signals can be detecte...

AI Technical Summary

Problems solved by technology

[0005] The traditional method of defending against intrusive attacks is that the signal (data) at the transmitter of the sensor is a fixed value or a signal (data) that changes periodically. Once the signal is known by the attacker and simulated on the metal wire, it will be loss of protection

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