Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-03-10
2009-06-16
Colin, Carl (Department: 2436)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S156000, C713S157000, C713S173000, C713S175000, C713S178000, C713S179000, C713S180000
Reexamination Certificate
active
07549051
ABSTRACT:
A digital certificate is employed to produce a digital signature for a digital construct. In the digital certificate is set forth a certificate validity period defining for the digital certificate a time period during which the digital certificate is to be honored as valid for producing digital signatures, and a signature validity period defining for each digital signature produced based on the digital certificate a time period during which the digital signature is to be honored as valid.
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Dillaway Blair Brewster
LaMacchia Brian
Manferdelli John
Paramasivam Muthukrishnan
Colin Carl
Microsoft Corporation
Woodcock & Washburn LLP
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