How to Physical unclonable function?

Q: How to Physical unclonable function?

Composite security marking,Physically unclonable function (PUF) circuits employing multiple puf memories to decouple a puf challenge input from a puf response output for enhanced security

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2 results about "Physical unclonable function" patented technology

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A physical unclonable function (sometimes also called physically unclonable function), or PUF, is a physically-defined "digital fingerprint" that serves as a unique identifier for a semiconductor device such as a microprocessor. They are based on unique physical variations which occur naturally during semiconductor manufacturing. A PUF is a physical entity embodied in a physical structure. Today, PUFs are usually implemented in integrated circuits and are typically used in applications with high security requirements, more specifically cryptography.

Composite security marking

ActiveUS10002362B1User identity/authority verificationCharacter and pattern recognitionCryptographic hash functionDigital signature

The present invention relates to the field of anti-counterfeit protection of products. Specifically, the invention is directed to a composite security marking for a physical object, in particular to an anti-counterfeit product marking. In particular, without limitation, such composite security marking can be used in connection with or can form a component of a multi-component security system, in particular of an anti-counterfeit protection system, which is also disclosed herein as part of an overall solution for anti-counterfeit protection. The composite security marking comprises a physical unclonable function, PUF, and a representation of a digital signature or of a pointer indicating a location where said digital signature can be accessed. The digital signature digitally signs a hash value resulting from application of a predetermined cryptographic hash function to data representing a response generated by the PUF in reaction to a challenge of a predetermined challenge-response authentication scheme.

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Owner:MERCK PATENT GMBH

Physically unclonable function (PUF) circuits employing multiple puf memories to decouple a puf challenge input from a puf response output for enhanced security

InactiveUS20190342106A1User identity/authority verificationDigital storagePhysical unclonable functionChallenge response

Physically unclonable function (PUF) circuits employing multiple PUF memories to decouple a PUF challenge input from a PUF response output for enhanced security. The PUF circuit includes a PUF challenge memory and a PUF response memory. In response to a read operation, the PUF challenge memory uses a received PUF challenge input data word to address PUF challenge memory arrays therein to generate a plurality of intermediate PUF challenge output data words. The PUF response memory is configured to generate a second, final PUF response output data word in response to intermediate PUF challenge output data words. In this manner, it is more difficult to learn the challenge-response behavior of the PUF circuit, because the PUF challenge input data word does not directly address a memory array that stores memory states representing final logic values in the PUF response output data word.

Owner:QUALCOMM INC

2 results about "Physical unclonable function" patented technology

Composite security marking

Physically unclonable function (PUF) circuits employing multiple puf memories to decouple a puf challenge input from a puf response output for enhanced security

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