Method of implementing a key recovery system
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United States of America Patent
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Aug 21, 2001
Grant Date -
N/A
app pub date -
Sep 16, 1998
filing date -
Sep 16, 1997
priority date (Note) -
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Abstract
A method of generating a recovery key encryption key (RKEK) in a secure manner by an integrated circuit (IC) and a key recovery escrow agent includes the steps of generating by the IC a first number having a private component and a public component, and generating by the escrow agent a second number having a private component and a public component. The public component of the first number is provided to the escrow agent, and the public component of the second number is provided to the integrated circuit. A Diffie-Hellman modulo-exponentiation mathematical operation is performed by the integrated circuit using the private component of the first number, the public component of the first number and the public component of the second number to create the RKEK. A similar operation is performed by the escrow agent using the private component of the second number, the public number of the second number and the public component of the first number to create the RKEK at its end.
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