Method and apparatus for copy protecting a digital electronic device
AssigneenComputing Inc.
InventorsSubir Ghosh, Gabriele Sartori
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Abstract
A device and a method of authenticating an electronic device are described. The method may comprise transmitting a token value and a parameter value to the electronic device and selecting a private key within the electronic device using the parameter value. The token value may be processed with a method selected by the parameter value to generate a processed token. The processed token may be compared with an expected processed token and the electronic device may be authenticated if the processed token compares favorably with said expected processed token.
Claims20
A method of authenticating an electronic device, said method comprising:
- transmitting a token value and a parameter value to said electronic device;
- selecting a private key within said electronic device using said parameter value;
- processing said token value with a method selected by said parameter value to generate a processed token;
- comparing said processed token with an expected processed token;
- and
- authenticating said electronic device if said processed token compares favorably with said expected processed token.
An electronic device having a security system, said electronic device comprising:
- receiving communication circuitry for receiving a token value and a parameter value from an authenticator;
- authentication circuitry, said authentication circuitry selecting a private key using said parameter value and processing said token value with a method selected by said parameter value to generate a processed token;
- and
- transmitting communication circuitry for transmitting said processed token to said authenticator, said authenticator authenticating said electronic device by comparing said processed token with an expected processed token.
An electronic device having a security system, said electronic device comprising:
- means for receiving a token value and a parameter value from an authenticator;
- processing means, said authentication circuitry selecting a private key using said parameter value and processing said token value with a method selected by said parameter value to generate a processed token;
- and
- means for transmitting said processed token to said authenticator, said authenticator authenticating said electronic device by comparing said processed token with an expected processed token.
Dependencies are inferred from the claim text.