Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Having particular address related cryptography
Reexamination Certificate
2007-12-18
2007-12-18
Vu, Kim (Department: 2135)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Having particular address related cryptography
C713S150000, C713S151000, C713S168000, C713S171000, C713S153000, C709S223000, C709S225000, C709S227000, C709S228000, C709S231000
Reexamination Certificate
active
10447191
ABSTRACT:
A method of communicating an encrypted data broadcast to a plurality of virtual private network receivers is disclosed. A first communication channel is established between a first one of the receivers and a network node. A private data stream is communicated to the first receiver on the first channel. A request is received from the first receiver to join a broadcast data stream that is directed to a plurality of receivers by a broadcast server. A second encrypted communication channel is established between the first receiver and the network node for purposes of carrying the broadcast data stream. Decryption information, which the first receiver can use to decrypt information that is sent on the second channel, is sent to the first receiver through the first channel. The broadcast data stream is then communicated to the first receiver on the second channel. As a result, a particular receiver can receive an encrypted broadcast that is encrypted as part of a single session for a large plurality of other receivers, without impacting separate, private encrypted communications conducted by the particular receiver.
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Aviani James
Champagne Jean-Philippe
Gnagy Matthew
Lueckenhoff Bruce
Cisco Technology Inc.
Dada Beemnet W
Hickman Palermo & Truong & Becker LLP
Vu Kim
LandOfFree
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