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Chip, authentication circuit and method for said chip

A chip and authentication technology, applied in internal/peripheral computer component protection, digital data authentication, etc., can solve problems such as chip fuse mechanism cracking, and achieve the effect of enhancing fuse defense

Active Publication Date: 2019-11-12
SHANGHAI IND U TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a chip, an authentication circuit and a method for the chip, which are used to solve the problem that the fusing mechanism of the chip is easy to be cracked in the prior art

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  • Chip, authentication circuit and method for said chip
  • Chip, authentication circuit and method for said chip
  • Chip, authentication circuit and method for said chip

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Embodiment Construction

[0024] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0025] Such as figure 1 As shown, the present invention provides a chip. Wherein, the processor is, for example, an MCU (microprocessor). The chip also includes: an authentication circuit 1 and an external interface 21 . Wherein, the external interface 21 is used for connecting a burner. The authentication circuit 1 is used to detect whether t...

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Abstract

The invention provides a chip, an authentication circuit and an authentication method of the chip, wherein the chip comprises an external interface and a storage unit; the authentication circuit comprises a processing unit and a switching unit; the processing unit is connected with the storage unit and the external interface and is used for reading a first password in the storage unit when being power on, receiving a second password of the external interface, comparing the two passwords and outputting a level signal of a corresponding comparison result; and the switching unit is connected with the processing unit and is used for determining to switch on / switch off an access between the external interface and the storage unit based on the received level signal. According to the chip, the authentication circuit and the authentication method of the chip, an illegal technician can be logically prevented from willfully modifying a program in the chip, the fusing defense of the chip is effectively improved and meanwhile a repeatable fusing mechanism is provided for the chip.

Description

technical field [0001] The invention relates to the field of chips, in particular to a chip, an authentication circuit and a method for the chip. Background technique [0002] As smart devices become more and more popular in today's society, the usage of MCU is also increasing. Especially with the development of the Internet of Things, information security is becoming more and more important. Unauthorized users cannot access the internal programs and data of the MCU, which will lead to the cracking of important information in the chip containing the MCU. [0003] To enhance security protection, one existing measure is to add a hardware security fuse to the chip to prohibit access to data. The disadvantage of this method is that the fuse is easy to be located and used for intrusion attacks. A well-known method is to use UV light to wipe off the safety fuse, or FIB to jump the fuse circuit. [0004] In order to further improve the security level, another way is to make the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/78G06F21/45
CPCG06F21/45G06F21/78
Inventor 刘慧牟晨杰
Owner SHANGHAI IND U TECH RES INST
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