Secure authentication systems and methods
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United States of America Patent
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Jun 3, 2008
Grant Date -
Mar 25, 2004
app pub date -
Apr 25, 2003
filing date -
Apr 25, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
Systems and methods are provided for authentication by combining a Reverse Turing Test (RTT) with password-based user authentication protocols to provide improved resistance to brute force attacks. In accordance with one embodiment of the invention, a method is provided for user authentication, the method including receiving a username/password pair associated with a user; requesting one or more responses to a first Reverse Turing Test (RTT); and granting access to the user if a valid response to the first RTT is received and the username/password pair is valid.
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