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Challenge response systems

  • US 7,904,517 B2
  • Filed: 08/09/2004
  • Issued: 03/08/2011
  • Est. Priority Date: 08/09/2004
  • Status: Active Grant
First Claim
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1. Non-transitory computer storage media having a challenge-response system embodied thereon including computer-executable instructions that, when executed, perform a method for mitigating dissemination of spam, the system comprising:

  • a sending component that sends messages for a sender, wherein each message including verification information, at least a portion of which is unique to each message and is used for verification;

    a challenge receiving component at the sender that receives challenges; and

    a verification component that verifies for the sender that each received challenge is associated with a message that the sender sent in part by examining the received challenge for matching verification information, wherein the verification component moves challenges including matching verification information to an inbox of the sender and the verification component moves challenges not including matching verification information to a spam folder.

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