Secure cryptoprocessor

Abstract

According to an example aspect of the present invention, there is provided a cryptoprocessor comprising physical unclonable function circuitry comprising at least one physical unclonable function, and at least one processing core configured to process a challenge received from outside the cryptoprocessor by at least deriving a response to the challenge by providing the challenge as input to the physical unclonable function circuitry, using the response as an encryption key to encrypt a second encryption key, and by causing the encrypted second encryption key to be provided to a party which issued the challenge.

Description

technical field [0001] The present invention relates to secure cryptographic processing in data processing hardware. Background technique [0002] Cryptographic methods are used to authenticate communicating parties and to secure communications between these communicating parties. While modern cryptographic algorithms themselves are considered well-developed and resistant to cryptanalysis, it is usually relatively easy for an attacker to compromise one or both of the communication endpoints. A communication endpoint refers to a device used by a communicating party to participate in a communication. Such endpoint devices may include, for example, computers, smartphones, or cellular phones. Therefore, improving the security of such devices is a matter of concern. Contents of the invention [0003] According to some aspects, the subject-matter of the independent claims is provided. Some embodiments are defined in the dependent claims. [0004] According to a first aspect...

AI Technical Summary

Problems solved by technology

While modern cryptographic algorithms themselves are considered well-developed and resistant to cryptanalysis, it is usually relatively easy for an attacker to compromise one or both of the communication endpoints

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