Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Central trusted authority provides computer authentication
Reexamination Certificate
2008-07-22
2008-07-22
Moise, Emmanuel L (Department: 2137)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Central trusted authority provides computer authentication
C713S170000, C713S171000, C713S175000, C380S030000
Reexamination Certificate
active
07404077
ABSTRACT:
A technique permitting an X.509 certificate to simultaneously support more than one cryptographic algorithm. An alternative public key and alternative signature are provided as extensions in the body of the certificate. These extensions define a second (or more) cryptographic algorithm which may be utilized to verify the certificate. These are not authenticated by the primary signature and signature algorithm in the primary cryptographic algorithm. These newly defined extensions are reviewed by a receiving entity if the entity does not support the cryptographic algorithm of the primary signature.
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Bracken, Esq. Joseph E.
Callahan Paul
Carey Rodriguez Greenberg & Paul LLP
Greenberg, Esq. Steven M.
International Business Machines - Corporation
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