Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2004-11-01
2008-12-09
Moazzami, Nasser G (Department: 2436)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S171000, C713S181000, C726S004000, C726S014000, C709S227000, C370S331000
Reexamination Certificate
active
07464267
ABSTRACT:
A system and method for establishing a shared secret media key between each of a caller endpoint and a callee endpoint for securing a real time media channel comprises: i) establishing a caller authenticated signaling session with the caller endpoint using a caller shared secret authentication key and a symmetric encryption algorithm; and ii) establishing a callee authenticated signaling session with the callee endpoint using a callee shared secret authentication key and the symmetric encryption algorithm. A caller public value is received from the caller endpoint through the caller authenticated signaling session and sent to the callee endpoint through the callee authenticated signaling session. The caller public value is a public value of a pair of values generated by the caller endpoint and useful for calculating a shared secret media key. A callee public value is received from the callee endpoint through the callee authenticated signaling session and sent to the caller endpoint through the caller authenticated signaling session. The callee public value is a public value of a pair of values generated by the callee endpoint and useful for calculating a shared secret media key. Both the caller endpoint and the callee endpoint calculate the shared secret media key using Diffie-Hellman techniques.
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Lee Chih-Ping
Zhu Yuesheng
Abedin Shanto M
Innomedia Pte Ltd.
Moazzami Nasser G
O'Hagan Timothy P
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