Method and system for identifying legitimate chip

Abstract

The invention discloses a legal chip recognition method and system. The legal chip recognition method comprises that a reading device sequentially sends M instructions to be handled including N preset instructions to a chip to be read; the chip to be read responds to each instruction to be handled; the reading device obtains a first essential factor set which includes the signal characteristic of a response message that the chip to be read gives to each preset instruction, the signal characteristic of each response message comprises at least one of the following essential factors of the level value, the level rising edge duration, the pulse width, the duty ratio, the state value, the moment of the differential signal intersection point, the signal frequency and signal jitter; the reading device carries out first handling on the first essential factor set to obtain the signal characteristic of the chip to be read, and obtains the result of comparing the signal characteristic of a legal chip corresponding to the identification of the chip to be read with the signal characteristic of the chip to be read, and under the condition that the comparison result is consistent, the chip to be read is recognized to be a legal chip.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a legal chip identification method and system. Background technique [0002] At present, devices to be read with built-in chips have been increasingly used in fields involving property security and identity authentication, such as smart cards, ID cards, etc. The chips built into these devices to be read often store the user's identity or property, etc. Secure data, therefore, the data security requirements for built-in chips will also be higher. [0003] Although the existing technology can prevent the chip from being illegally copied to a certain extent and ensure data security, it is difficult to guarantee that the chip will not be illegally copied. Algorithms and other methods to obtain information such as user security data and chip identification stored in the built-in chip of the legal device to be read, and store the illegally obtained data into the chip of the fake d...

AI Technical Summary

Problems solved by technology

[0003] Although the existing technology can prevent the chip from being illegally copied to a certain extent and ensure data security, it is difficult to guarantee that the chip will not be illegally copied. Algorithms and other methods to obtain information such as user security data and chip identification stored in the built-in chip of the legal device to be read, and store the illegally obtained data into the chip of the fake device to be read, so that the fake device to be read is Stored with the same user security data and chip identification information as the legal device to be read, in this case, the reading device will think that the fake device to be read is legitimate, and then perform corresponding operations, endangering the user's security. Identity and Property Security

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