Method and apparatus for secure key replacement

Details Method and apparatus for secure key replacement Method and apparatus for secure key replacement

2003-12-09

2008-09-02

Barron, Jr., Gilberto (Department: 2132)

Cryptography

Key management

C380S278000, C380S279000, C380S282000, C713S168000, C713S176000, C713S178000, C726S022000

Reexamination Certificate

active

07421079

ABSTRACT:
A method, and a corresponding apparatus, provide for remote, secure replacement of private keys in a private key infrastructure. The method is implemented as a secure key replacement protocol (SKRP), which includes the steps of receiving a rekey request, where the rekey request identifies a private key for replacement, authenticating the rekey request, replacing the identified private key with a SKRP key, signing the challenge with the SKRP key, and returning the signed challenge. The rekey request includes the SKRP key and the challenge.

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Menezes et al., “handbook of Applied Cryptography”, 1997, CRC Press, pp. 506-515.

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