Device and method for protecting sensitive information of chip system

Abstract

The invention discloses a device and a method for protecting sensitive information of a chip system. The device comprises a clock input module, a detection module, an OR-gate circuit, a signal setting device, a switch, a discharging resistor, a reserve power supply and a storage. The storage stores the sensitive information, and the detection module performs timing completeness detection on temperature, voltage, frequency, light intensity and physical deformation of the chip system to guarantee safety operation of the chip system. When the chip system is attacked and abnormity of the chip system is detected, the OR-gate circuit generates a high level signal; after receiving the high level signal, the signal setting device controls the power input end of the storage to be disconnected from the reserve power supply, and controls the power input end of the storage to be connected with one end of the discharging resistor to form a discharging access between the storage and the ground, so that sensitive data in the storage are cleared away quickly and sensitive information is not stolen by an attacker due to quick clearing.

Description

technical field [0001] The invention relates to the technical field of chip design, in particular to a device and method for protecting sensitive information of a chip system. Background technique [0002] SoC (System on Chip) refers to an electronic device that integrates all or part of the necessary electronic circuits on a single chip. Usually, SoC can integrate digital logic circuits such as central processing units, bus units, and analog modules such as clock crystal oscillators. , the power supply system also integrates various memories, for example, ROM (Read-Only Memory, read-only memory), RAM (Random Access Memory, random access memory), FLASH (programmable memory), EPROME (Electrically Erasable Programmable Read -Only Memory, Electrically Erasable Programmable Memory), etc. In addition, some sensitive information will be stored in the chip, such as keys, chip ID, etc. Chip attackers will try to obtain these sensitive information through various means, and use this ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a device and method for protecting the sensitive information of the chip system, so as to solve the problem that the operation time of chip erasing or writing data is too long in the prior art, so that the attacker can obtain longer time to attack the sensitive information The problem

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