Method and apparatus for regenerating secret keys in Diffie-Hellman communication sessions
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United States of America Patent
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Nov 19, 2002
Issued Date -
N/A
app pub date -
Oct 18, 2000
filing date -
Dec 4, 1997
priority date (Note) -
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Abstract
A system and method for regenerating secret keys that have been used to encrypt communications between two parties are disclosed. The system and method involve securely escrowing only one of the private values that the parties use in a Diffie-Hellman exchange to establish secure communications between the parties. The public value for each communication session is controlled after the escrow of the private value, and the secret keys are regenerated from the escrowed private value and the controlled public values. The escrowed private value is transmitted to the escrow center with full proof of security and authenticity, and the escrowed private value can be changed and re-sent to the escrow center.
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