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US 9,806,719 B1Granted
Physically unclonable circuit having a programmable input for improved dark bit mask accuracy
AssigneeIntel Corporation
InventorsSanu K. Mathew, Sudhir K. Satpathy, Vikram B. Suresh
Life of this patent
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Abstract
An apparatus is described. The apparatus includes a physically unclonable (PUF) circuit having a programmable input. The programmable input is to receive a value that caused the PUF circuit to strengthen its stability or strengthen its instability.
Claims23
An apparatus, comprising:
- a physically unclonable (PUF) circuit having a programmable input, the programmable input to receive a value that caused the PUF circuit to strengthen its stability or strengthen its instability, the PUF circuit further comprising a clock signal input to receive a clock signal for taking respective samples of values that the PUF circuit resolved to.
A computing system, comprising:
- a plurality of processing cores;
- a memory controller coupled to the plurality of processing cores;
- a system memory coupled to the memory controller;
- a flat panel display;
- a signature checking circuit comprising a plurality of PUF circuits, each of the PUF circuits comprising a programmable input, the programmable input to receive a value that caused its respective PUF circuit to strengthen its stability or strengthen its instability.
2 more elements
A method, comprising:
- testing a plurality of PUF circuits for stability;
- programming those of the plurality of PUF circuits that are deemed stable with a respective value that strengthens their stability;
- programming those of the plurality of PUF circuits that are deemed unstable with a respective value that strengthens their instability;
- burning-in the plurality of PUF circuits;
- generating a dark bit mask;
- and,
- generating a signature vector.
4 more elements
An apparatus, comprising:
- a physically unclonable (PUF) circuit having a programmable input, the programmable input to receive a value to cause the PUF circuit to strengthen its stability or strengthen its instability, the PUF circuit further comprising a clock signal input to receive a clock signal for taking multiple samples of the PUF circuit to measure the PUF circuit's stability.
An apparatus, comprising:
- a signature checking circuit comprising a plurality of PUF circuits, each of the PUF circuits comprising a programmable input, the programmable input to receive a value to cause its respective PUF circuit to strengthen its stability or strengthen its instability.
Dependencies are inferred from the claim text.