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Authentication processor using a signature part

  • US 7,467,301 B2
  • Filed: 09/28/2007
  • Issued: 12/16/2008
  • Est. Priority Date: 05/18/2004
  • Status: Expired due to Fees
First Claim
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1. A method of authenticating an object using a processor, the method including steps of:

  • receiving indicating data, the indicating data being generated in response to sensing of coded data provided on or in a surface associated with the object, the indicating data being indicative of;

    an identity; and

    ,a part of a signature, the signature being a digital signature of at least a part of the identity and at least part of predetermined padding, and comprising a plurality of signature parts;

    determining from the indicating data, a received identity, a received signature part and a received signature part identifier;

    determining, using the received identity and the received signature part identifier, a determined signature part;

    comparing the determined signature part to the received signature part; and

    authenticating the object using the result of the comparison,wherein the step of determining the determined signature part comprises sub-steps of;

    determining, using the received identity, the predetermined padding;

    determining, using the predetermined padding, the received identity, and a secret key, the determined signature; and

    determining the determined signature part from the determined signature and the received signature part identifier.

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