Cryptography – Key management – Key escrow or recovery
Reexamination Certificate
2006-05-23
2006-05-23
Revak, Christopher (Department: 2131)
Cryptography
Key management
Key escrow or recovery
C713S155000, C713S156000, C713S157000, C713S158000, C713S175000, C713S176000, C380S278000, C380S279000, C380S281000, C380S282000, C380S283000, C380S284000, C380S285000, C726S010000
Reexamination Certificate
active
07050589
ABSTRACT:
Methods and systems in accordance with the present invention allow users' private keys corresponding to their digital certificates to be stored and archived outside of the control of a Certificate Authority (“CA”). A CA may have a policy that a user's private key must be archived in order to receive a digital certificate upon a registration request from the user. Typically, the CA knows that the user's private key is archived because it implements the archival of the key, for example, on a data recovery manager and associated internal database that the CA controls. Methods and systems in accordance with the present invention allow for the enforcement of such a policy while allowing the archival of the private keys to be outside of the control of the CA by having a data recovery manager supply a digitally signed proof of archival token with a digital certificate request to a CA. The CA is assured that the key has been archived. Methods and systems allow for the data recovery manager and a database of archived keys to be controlled by other entities, including the user or client, for example.
REFERENCES:
patent: 6367013 (2002-04-01), Bisbee et al.
patent: 6553493 (2003-04-01), Okumura et al.
patent: 2002/0029350 (2002-03-01), Cooper et al.
CFSB “How Key Escrow Might Work?”, Computer Fraud & Security Bulleton, Jul. 1, 1996.
Chai Longbit
Finnegan Henderson Farabow Garrett & Dunner LLP
Revak Christopher
Sun Microsystems Inc.
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