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Method and apparatus for processing digitally signed messages to determine address mismatches

  • US 7,653,696 B2
  • Filed: 07/29/2005
  • Issued: 01/26/2010
  • Est. Priority Date: 07/29/2005
  • Status: Active Grant
First Claim
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1. A method of processing signed messages received at a computing device, the method comprising the steps of:

  • a) receiving a message comprisinga header identifying at least a sender address,at least one portion of signed data,a digital signature corresponding to each portion of signed data, andat least one message separator;

    b) determining whether a first message separator appears within a portion of signed data;

    c) if the first message separator does not appear within a portion of signed data,performing at least one pre-determined action for each digital signature in the message that appears after the first message separator; and

    d) if the first message separator appears within a portion of signed data,verifying that the sender address matches an address associated with a key used to generate a digital signature that appears after the first message separator and that corresponds to the portion of signed data within which the first message separator appears, andperforming at least one pre-determined action for each other digital signature in the message that appears after the first message separator.

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