Integrated-circuit self-destructing circuit based on fuse trimming technology and method thereof

Abstract

The invention discloses an integrated-circuit self-destructing circuit based on a fuse trimming technology. The circuit comprises a receiving module, a password verification module, a fuse trigger circuit and a triggered self-destructing control module, wherein the receiving module is used for receiving a self-destructing command and a self-destructing password; the password verification module is used for completing self-destructing password verification so as to prevent self-destructing false triggering; the fuse trigger circuit is used for emitting a triggering signal to the triggered self-destructing control module after the password verification is passed; the triggered self-destructing control module is used for permanently fusing a fuse in an internal fuse circuit after receiving a trigger signal input by the fuse trigger circuit; and simultaneously the triggered self-destructing control module generates one pseudo-random code control signal and the pseudo-random code control signal is used for controlling normal connection or cross connection of a data flow. In the invention, because the fuse trimming technology is adopted, an external state of an integrated circuit is not changed and safety and invisibility are possessed; and because a pseudo-random code is used, a function of the self-destructed integrated circuit is regular and the circuit is not easy to be discovered so that confusability is possessed.

Description

technical field [0001] The invention relates to an integrated circuit self-destruction circuit and method based on fuse trimming technology. It uses the one-time write information (non-erasable) characteristic of the fuse trimming technology to complete the functional permanent self-destruction of the integrated circuit. Background technique [0002] Fuse trimming technology is a trimming technology that uses digital input to control high current to fuse the designed fuse inside the integrated circuit chip to change the logic state of the fuse circuit output. It is similar to the one-time writing of ROM (non-erasable ), are generally used in ADC, DAC and reference circuit chips to complete small adjustments to the accuracy to achieve higher accuracy. [0003] The self-destruct function of integrated circuits is mainly used in the field of information security of integrated circuits. For example, if a device such as a mobile phone or a laptop is stolen, the information stor...

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Problems solved by technology

But these methods are firstly unsafe, and secondly, the external manifestations of damage are very obvious, not concealed and confusing

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