Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Central trusted authority provides computer authentication
Reexamination Certificate
1997-08-08
2010-06-22
Lanier, Benjamin E (Department: 2432)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Central trusted authority provides computer authentication
C455S411000
Reexamination Certificate
active
07743247
ABSTRACT:
The present invention provides a method and apparatus for a trusted service provider (TSP) which assists with the secure exchange of data across the public switched telephone network. Communications are routed via a TSP, which uses cryptographic techniques to conceal the identities (e.g., telephone numbers) of the call initiator and call recipient, thereby preventing traffic analysis attacks. The TSP also performs cryptographic handshakes with the call initiator and call recipient to authenticate callers. The TSP further provides cryptographic keying material which communicants may use to help protect communications and to directly authenticate and identify each other. Although the TSP is trusted to negotiate the connection and is involved in the process, the communicants can perform their own key agreement and authentication for protecting data routed via the TSP.
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Bruce Schneier, Applied Cryptography, 1996, John Wiley & Sons Inc., Second Edition, p. 516.
Allen Tim
Gardiner Michael
Horgan Michael J.
McGill Terri
Lanier Benjamin E
O'Banion John P.
Synectic Design LLC
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