Methods and apparatus for delegation of cryptographic servers for capture-resilient devices
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United States of America Patent
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May 13, 2008
Grant Date -
Mar 13, 2003
app pub date -
Jun 26, 2002
filing date -
Jun 26, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Improved cryptographic techniques are provided by which a device that performs private key operations (e.g., signatures and/or decryptions), and whose private key operations are protected by a password, is immunized against offline dictionary attacks in case of capture by forcing the device to confirm a password guess with a designated entity or party in order to perform a private key operation, and by which the initiating device may dynamically delegate the password-checking function (i.e., confirmation of the password guess) from the originally designated entity or party to another designated entity or party.
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