Method and device for preventing chip from being cracked, equipment and storage medium

Abstract

The invention relates to the technical field of information security and particularly relates to a method and device for preventing a chip from being cracked, equipment and a storage medium. The method comprises steps that a program of a development mode part and a program of a security mode part are made to be respectively stored in different address intervals; in the program running process, the current life cycle is judged randomly, the current mode information of the chip is obtained, and whether the address of the current running program is in the address interval corresponding to the current mode or not is judged; and if the address of the current running program is located outside the address interval corresponding to the current mode, running the program is stopped. The method is advantaged in that problems that an existing chip is prone to being cracked after being mistakenly attacked, and the content of the chip is obtained or tampered due to the fact that a program returns to a development mode from a security mode are solved. The method has the advantages that the condition that the content of the chip is acquired or tampered is reduced, cracking difficulty of the chip is greatly increased, and the chip is prevented from being cracked by external attacks.

Description

Technical field [0001] The present application relates to information security technology, in particular, to a method, apparatus, device, and storage medium that prevents chip being cracked. Background technique [0002] With the increasing popularity of safety chips, a variety of crack methods are endless. There are two main categories: invasive attacks and non-invasive attacks. Invasive attacks need to be destroyed, and then use precision instruments to complete; non-invasive attacks do not need physical damage to the chip, but attack through external means, such as "fault production technology", which utilizes voltage shock or clock impact, forced The processor performs an error operation, in some cases, can affect the decoding and execution of the instruction. Furthermore, the equipment required for non-invasive attacks can usually be self-made and upgraded, very cheap, low cost. Non-invasive attacks in certain occasions are particularly dangerous. [0003] Now the mode switc...

AI Technical Summary

Problems solved by technology

By running the BOOT program to judge the identification bit at the beginning, and then jump to run the program in the corresponding mode, this method is likely to be misjudged by external attacks and enter the wrong mode, thereby cracking the chip, obtaining or tampering with the internal information of the chip

[0004] In view of the related technologies mentioned above, the inventor believes that there are defects that the existing chip is easily cracked after being attacked by fault generation technology, and the program returns to the development mode from the security mode, resulting in the defect that the chip content is obtained or tampered with

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