Method for encrypting read-write chip identifier
A chip identification and identifier technology, applied in the protection of internal/peripheral computer components, etc., can solve problems such as product security threats, and achieve the effect of increasing uniqueness and security and saving logic circuit resources.
Inactive Publication Date: 2018-07-13
SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT +1
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Problems solved by technology
This poses a great threat to the security of the product itself.
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[0031] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0032]Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities m...
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The invention provides a method for encrypting a read-write chip identifier. The method comprises the steps of obtaining the chip identifier, wherein the chip identifier at least comprises a first identifier and a second identifier which are arranged according to a preset sequence; performing encryption operation on the chip identifier according to SM3, and obtaining the SM3 encrypted chip identifier; writing the SM3 encrypted chip identifier into a set address in an OTP register in the chip; when data needs to be read from the set address of the OTP register, obtaining data from the OTP register; performing encryption operation on the obtained data according to SM3, and obtaining SM3 encrypted reading data; providing the SM3 encrypted reading data. According to the method for encrypting the read-write chip identifier, the chip identifier at least comprises the first identifier and the second identifier, and the first identifier is obtained according to a logic value of a chip specificmasking layer graph, so that the OTP register can obtain the unique chip identifier, and the chip identifier is difficultly reversely cracked and cannot be copied.
Description
technical field [0001] The invention relates to the technical field of semiconductors, in particular to a method for encrypting and reading chip identifiers. Background technique [0002] As embedded applications become more and more widespread, the security of chip products is becoming more and more important. On the one hand, it is to protect the hardware design, and on the other hand, it is also for the safety of the product itself to prevent hacking (HACKED). In order to protect the data in the chip, more and more manufacturers provide a special register in the chip: OTP register (OneTime Programmable, one-time programming register). The OTP register is a one-time write for each bit of information, it cannot be rewritten, and the data will not be lost when the power is turned off, and the data can be read out repeatedly. [0003] Chip identifier Chip ID, also known as Device Unique Keys, is the core technology of chip security and cannot be reversely decrypted or reuse...
Claims
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Login to View More IPC IPC(8): G06F21/73
CPCG06F21/73
Inventor 李林傅豪温建新李琛李铭张远陈西昌
Owner SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT