Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Having particular address related cryptography
Reexamination Certificate
2005-05-31
2005-05-31
Peeso, Thomas R. (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Having particular address related cryptography
C713S168000, C713S152000, C713S152000
Reexamination Certificate
active
06901510
ABSTRACT:
Apparatus and computer-readable media are disclosed for establishing secure multicast communication among multiple multicast proxy service nodes of domains of a replicated directory service that spans a wide area network. Domains are organized in a logical tree. Each domain has a logical tree that organizes the multicast proxy service nodes, a group manager at the root node, a multicast key distribution center, multicast service agent, directory service agent and key distribution center. Multicast proxy service nodes store a group session key and a private key. Replication of the directory performs key distribution. A multicast group member joins or leaves the group by publishing message. The local key distribution center and multicast service agent obtain the publisher's identity from a local directory service agent. Based on the identity, a secure channel is established with the directory service agent in the group member's domain. Keys of the binary tree branch that contains the joining or leaving node are updated, and an updated group session key and a new private key are received.
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Cisco Technology Inc.
Hickman Palermo & Truong & Becker LLP
Peeso Thomas R.
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