Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2007-12-04
2007-12-04
Moazzami, Nasser (Department: 2136)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
Reexamination Certificate
active
09693713
ABSTRACT:
According to the invention, techniques for authenticating that a digitally signed document is genuine. Specific embodiments according to the present invention can determine whether a digital signature was generated by a digital signature generator, or if the digital signature was generated by a third party posing as the digital signature generator. Specific embodiments can provide independent verification of digital signer identity based upon prior signed messages, time/date stamps, and the like. Techniques according to the present invention can be embodied in methods, apparatus, computer software and systems.
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Iwamura Mitsuru
Matsumoto Tsutomu
Miyazaki Kunihiko
Moritsu Toshiyuki
Sakai Mizuhiro
Hitachi , Ltd.
Hoffman Brandon S
Moazzami Nasser
Townsend and Townsend / and Crew LLP
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