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AssigneeNXP B.V.
InventorsBRUCE MURRAY, HELMUT ALEXANDER GOETTL, SVEN HEINE, CHRISTIAAN KUIPERS
Estimating the term…
A data processing system having a PUF and method for providing multiple enrollments, or instantiations, of the PUF are provided. A PUF segment includes a plurality of SRAM cells on an integrated circuit. A PUF response from the PUF segment is used to create a first activation code and a first PUF key. A second PUF key may be created from the PUF response. Initially, during a second enrollment, the PUF response is combined with the first activation code to reproduce a codeword. The first secret string is reconstructed by encoding the codeword. The codeword is combined with the first activation code to reproduce the PUF response. Inverse anti-aging is applied to the PUF response. Then a second secret string is generated using a random number generator (RNG). The second secret string is encoded to produce a new codeword. The new codeword is combined with the recovered PUF response to create a second activation code. The second activation coded is hashed with the second secret string to provide a second PUF key.
In a system comprising a physically uncloneable function (PUF), wherein the PUF has been initialized with a first enrollment to produce a PUF response, a first activation code, and a first PUF key, a method for a second enrollment of the PUF to produce a second PUF key, the method comprising:
A method for creating first and second keys from a physically uncloneable function (PUF) on an integrated circuit, the method comprising:
A data processing system having a physically uncloneable function (PUF), wherein the PUF has been initialized to produce a PUF response, a first activation code, and a first PUF key, instructions for producing a second PUF key, the instructions stored in non-transitory storage media and comprising:
Dependencies are inferred from the claim text.