Chip legality authentication method and device

Abstract

The embodiment of the invention discloses a chip legality authentication method and device. The chip legality authentication method comprises the steps that the terminal acquires a random number, performs preliminary encryption on the random number to obtain a first ciphertext, and sends the random number and the first ciphertext to an authenticated chip; the authenticated chip performs secondary encryption on the random number to obtain a second ciphertext, judges whether the second ciphertext is the same as the first ciphertext or not, encrypts the random number for the third time to obtain a third ciphertext if the second ciphertext is the same as the first ciphertext, and sends the third ciphertext to the terminal; the terminal encrypts the random number for the fourth time to obtain a fourth ciphertext; the terminal judges whether the fourth ciphertext is the same as the third ciphertext or not, wherein if the fourth ciphertext is the same as the third ciphertext, the authenticated chip is a legal chip. According to the chip legality authentication method, due to such a bidirectional authentication mechanism, an illegal authentication request can be effectively avoided, and the chip can only be authenticated by a legal chip authenticator, so that the safety of chip authentication is guaranteed.

Description

technical field [0001] The invention relates to the fields of information security and integrated circuits, and more specifically, to a chip legality identification method and device. Background technique [0002] In various current information system applications, various chips issued through illegal channels may be at risk of being cracked. This cracking includes not only the logical functions of the chip, but also the private data or keys inside the chip. Chip cracking methods include reverse engineering, bypass attacks, intrusive physical attacks, and hardware Trojan horses or security holes. After the chip is cracked, it may be copied illegally, resulting in no protection of intellectual property rights and no guarantee of security. Therefore, a safe and reliable chip legitimacy identification method is needed to ensure that before an active chip performs a predetermined function, it can be confirmed whether it is legally manufactured or a counterfeit chip. If it is n...

AI Technical Summary

Problems solved by technology

However, the security of this chip authentication mechanism itself also has risks, and the circuit modules or key certificates related to chip legality authentication may also be cracked.

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