Chip, data protection device and method of chip
A data protection, chip technology, applied in the direction of internal/peripheral computer component protection, etc., can solve the problem of chip data insecurity, and achieve the effect of improving the security level, preventing unlimited attempts, and preventing tampering
Active Publication Date: 2017-07-04
SHANGHAI IND U TECH RES INST
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Problems solved by technology
[0006] The invention provides a chip, a data protection device and method for the chip, which are used to solve the problem of insecure data stored in the chip in the prior art
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[0027] 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.
[0028] Such as figure 1 As shown, the present invention provides a chip with a data protection device. The data protection device is used to encrypt the storage information stored in the storage unit in the chip, and cooperate with the password verification mechanism to realize effective protection of the data in the chip. Here, the chip 1 mainl...
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The invention provides a chip, a data protection device and a data protection method of the chip, wherein the chip comprises an external interface and a storage unit; the method comprises the steps of allowing to receive a second password of the external interface within a timing length after power on, and reading a first password in the storage unit; comparing the second password transmitted by external interface with the first password, and determining to switch on / switch off an access between the external interface and the storage unit based on a comparison result; and decrypting encrypted storage information corresponding to the first password based on the first password provided by the processing unit, and feeding back the storage information through the corresponding access according to a command from the external interface. According to the chip, the data protection device and the data protection method of the chip, the storage information is encrypted and stored and decrypted and read by use of an encryption and decryption unit and the safety of the storage information stored in the storage unit is guaranteed.
Description
technical field [0001] The invention relates to the field of chips, in particular to a chip, a data protection device and method for the chip. Background technique [0002] As smart devices become more and more popular in today's society, the usage of MCU (microprocessor) 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 i...
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IPC IPC(8): G06F21/72
CPCG06F21/72
Inventor 刘慧牟晨杰
Owner SHANGHAI IND U TECH RES INST