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Prevention of unauthorized scripts

  • US 7,606,915 B1
  • Filed: 02/25/2003
  • Issued: 10/20/2009
  • Est. Priority Date: 02/25/2003
  • Status: Active Grant
First Claim
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1. A method of preventing automated access to a service provided by a server coupled to a data communication network, said method comprising:

  • delivering a first test to a client coupled to the data communication network for rendering to a user in response to the user requesting access to the service via the client, said first test being a human interaction proof test;

    delivering a second test to the client as an alternative to the first test, said second test being a human interaction proof test;

    delivering a third test to the client as an alternative to the first and second tests, said third test including a computational puzzle to be solved by the client, said first, second, and third tests each having a different correct solution, at least one of said first, second, and third tests being elected by the user;

    receiving, via the client, a response to the at least one of the tests elected by the user; and

    granting access to the service via the client if the received response is the correct solution to the at least one of the tests elected by the user.

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