Device, system and method for determining authenticity of an item
First Claim
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1. A physical uncloneable function (PUF) device, comprising:
- a memory that comprises a PUF pattern realized through a physical process and for determining authenticity of an item, said PUF pattern having physical characteristics that generate a secret cryptographic key which may be read by an appropriate sensor, said PUF pattern being selected from the group consisting of a coating PUF pattern containing at least two random dielectric particles with different dielectric constants may be measured and an optical PUF pattern comprising a medium containing disordered structures producing a pattern when illuminated by a laser beam, said PUF pattern being arranged to be damaged when using said item for the first time, wherein damaging the PUF pattern comprises either mechanically destroying the PUF pattern or changing the identity of the PUF pattern.
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Abstract
This invention relates to physical uncloneable function (PUF) devices for determining authenticity of an item, systems for determining authenticity of a physical item, and methods for determining authenticity of an item. A PUF pattern of the PUF device is damaged when using the item for the first time.
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Citations
10 Claims
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1. A physical uncloneable function (PUF) device, comprising:
a memory that comprises a PUF pattern realized through a physical process and for determining authenticity of an item, said PUF pattern having physical characteristics that generate a secret cryptographic key which may be read by an appropriate sensor, said PUF pattern being selected from the group consisting of a coating PUF pattern containing at least two random dielectric particles with different dielectric constants may be measured and an optical PUF pattern comprising a medium containing disordered structures producing a pattern when illuminated by a laser beam, said PUF pattern being arranged to be damaged when using said item for the first time, wherein damaging the PUF pattern comprises either mechanically destroying the PUF pattern or changing the identity of the PUF pattern. - View Dependent Claims (2, 3)
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4. A system for determining authenticity of a physical item, comprising:
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a physical uncloneable function (PUF) device comprising a PUF pattern realized through a physical process and for determining authenticity of an item wherein said PUF pattern is arranged to be damaged when using said item for the first time, said PUF pattern having physical characteristics that generate a secret cryptographic key which may be read by an appropriate sensor, said PUF pattern being selected from the group consisting of a coating PUF pattern containing at least two random dielectric particles with different dielectric constants and an optical PUF pattern comprising a medium containing disordered structures producing a pattern when illuminated by a laser beam; and
,a control device arranged for communication with said PUF device. - View Dependent Claims (5, 6, 7, 8)
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9. A method for determining authenticity of an item, comprising:
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adding a physical unclonable function (PUF) device comprising a PUF pattern realized through a physical process onto said item, said PUF pattern having physical characteristics that generate a secret cryptographic key which may be read by an appropriate sensor, said PUF pattern being selected from the group consisting of a coating PUF pattern containing at least two random dielectric particles with different dielectric constants and an optical PUF pattern comprising a medium containing disordered structures producing a pattern when illuminated by a laser beam, verifying the PUF pattern by interrogating the PUF device with a control device, and damaging said PUF pattern when using said item for the first time, wherein damaging the PUF pattern comprises either mechanically destroying the PUF pattern or changing the identity of the PUF pattern. - View Dependent Claims (10)
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Specification