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System and method for preventing delivery of unsolicited and undesired electronic messages by key generation and comparison

  • US 8,347,095 B2
  • Filed: 06/17/2010
  • Issued: 01/01/2013
  • Est. Priority Date: 05/04/2004
  • Status: Active Grant
First Claim
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1. A method executable at least by a sending module comprising:

  • receiving, at the sending module, a first electronic message that includes a request to confirm that a second electronic message sent to an intended recipient was sent on behalf of an originator identified in the second electronic message, the first electronic message including a first data string purportedly generated by application of an algorithm to a portion of the second electronic message and further including the portion of the second electronic message;

    generating, at the sending module, a second data string, different from the first data string, by application of an algorithm to the portion of the second electronic message included in the first electronic message;

    comparing, at the sending module, the first data string to the second data string; and

    upon determining that the first data string does not match the second data string, responding to the first electronic message, denying the second electronic message was sent on behalf of the originator identified in the second electronic message due to the originator using a false originating address,wherein the algorithm applied to the portion of the second electronic message is selected from a plurality of algorithms based on one of time associated with the second electronic message or data in the portion of the second electronic message, andwherein the algorithm applied to the portion of the second electronic message is modifiable by changing at least one of a parameter, scheme, or component associated therewith.

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