Patent ID: 11889003
Assignee: TTP PLC
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. 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.