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Authentication apparatus and method for universal appliance communication controller

  • US 7,594,114 B2
  • Filed: 09/16/2002
  • Issued: 09/22/2009
  • Est. Priority Date: 09/16/2002
  • Status: Active Grant
First Claim
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1. An authentication method for communication between a first device and a second device over a network carrier, said authentication method comprising:

  • determining whether a message from the second device is in a proper format for authentication;

    encoding, in response to the message from the second device, a first authentication value upon receipt of the message, the first authentication value encoded with a first encryption key;

    calculating a first cyclic redundancy check value of the message upon receipt of the message;

    sending the encoded first authentication value to the second device;

    decoding, in response to a reply from the second device, a second authentication value upon receipt of the reply if the reply is received within a predetermined time after sending the encoded first authentication value, the second authentication value decoded with a second encryption key;

    comparing the first and second authentication values to determine the authenticity of the reply;

    extracting a second cyclic redundancy check value from the reply; and

    comparing the second cyclic redundancy check value from the reply against the first cyclic redundancy check value of the message.

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