Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Central trusted authority provides computer authentication
Reexamination Certificate
2001-06-28
2008-09-16
Vu, Kimyen (Department: 2135)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Central trusted authority provides computer authentication
C713S155000, C713S156000, C705S050000
Reexamination Certificate
active
07426635
ABSTRACT:
A method and system for managing public key certificates is provided. A user purchases a block of unallocated time. When the user requests a certificate, the user specifies a life span for the certificate. A certificate is generated, and the life span of the certificate is deducted from the block of unallocated time. If the user revokes a certificate, the remaining lifetime of the revoked certificate is added back to the block of unallocated time. This allows certificates to be revoked without loss of purchased time, and gives the user more flexibility at requesting and revoking certificates.
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Parkhill Robert Everett
Sutherland Blake Stanton
Entrust Technologies Limited
Pich Ponnoreay
Vu Kimyen
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