Unit verification method and device
AssigneeTTP Plc
InventorsTimothy John Palmer, Michael Beck
Life of this patent
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Abstract
A unit verification method to be performed on a unit under test (UUT) comprises connecting a verification device to the UUT. The verification device applies a set of challenge signals to the UUT and then measures the responses of the UUT to the challenge signals. The responses of the UUT are based on the challenge signals and the physical properties of the UUT. A registration key is generated based on the measured responses and is stored. The registration key is unique to the UUT.
Claims20
A unit registration method to be performed on a unit under test (UUT) by a verification device, the unit registration method comprising:
- connecting the verification device to the UUT;
- applying a set of challenge signals to a plurality of conductors of the UUT by the verification device,
- wherein the set of challenge signals are applied by the verification device to a varying selection of the plurality of conductors of the UUT, and
- wherein the varying selection of the plurality of conductors varies between each challenge signal within the set of challenge signals;
- receiving response signals from the UUT in response to the set of challenge signals;
- measuring electro-magnetic responses of the response signals,
- wherein the electro-magnetic responses are based on challenge signals within the set of challenge signals and physical properties of the UUT;
- generating a registration key based on the electro-magnetic responses measured by the verification device, wherein the registration key is unique to the UUT;
- and
- storing the registration key.
A unit authentication method to be performed on a unit under test (UUT) by a verification device, the unit authentication method comprising:
- connecting the verification device to the UUT;
- applying a set of authentication challenge signals to a plurality of conductors of the UUT by the verification device,
- wherein the set of challenge signals are applied by the verification device to a varying selection of the plurality of conductors of the UUT, and
- wherein the varying selection of the plurality of conductors varies between each challenge signal within the set of challenge signals;
- receiving response signals from the UUT in response to the set of authentication challenge signals;
- measuring the response signals, wherein the response signals are based on challenge signals within the set of authentication challenge signals and physical properties of the UUT;
- generating an authentication key based on the response signals measured by the verification device;
- and
- comparing the authentication key to a registration key of the UUT, wherein the verification device recovers the registration key from a storage location.
A unit verification and authentication method performed on a unit under test (UUT) by a verification device, the unit verification and authentication method comprising:
- a unit registration method comprising:
- connecting the verification device to the UUT;
- applying a set of registration challenge signals to a plurality of conductors of the UUT by the verification device,
- wherein the set of challenge signals are applied by the verification device to a varying selection of the plurality of conductors of the UUT, and
- wherein the varying selection of the plurality of conductors varies between each challenge signal within the set of challenge signals;
- receiving response signals from the UUT in response to the set of registration challenge signals;
- measuring the response signals, wherein the response signals are based on challenge signals within the set of registration challenge signals and physical properties of the UUT;
- generating a registration key based on the response signals measured by the verification device, wherein the registration key is unique to the UUT;
- and
- storing the registration key;
- and
- a unit authentication method comprising:
- connecting the verification device to the UUT;
- applying a set of authentication challenge signals to the plurality of conductors of the UUT by the verification device,
- wherein the set of challenge signals are applied by the verification device to the varying selection of the plurality of conductors of the UUT, and
- wherein the varying selection of the plurality of conductors varies between each challenge signal within the set of challenge signals;
- receiving response signals from the UUT in response to the set of authentication challenge signals;
- measuring the response signals received by the verification device, wherein the response signals are based on the set of authentication challenge signals and the physical properties of the UUT;
- generating an authentication key based on the response signals measured by the verification device, wherein the registration key is unique to the UUT;
- and
- comparing the authentication key to the registration key.
Dependencies are inferred from the claim text.