Bridged cryptographic VLAN

Details Bridged cryptographic VLAN Bridged cryptographic VLAN

2006-02-10

2010-10-19

Revak, Christopher A (Department: 2431)

Information security

Access control or authentication

Network

C713S150000, C370S395530

Reexamination Certificate

active

07818796

ABSTRACT:
The invention comprises three extensions of the IEEE 802.1Q VLAN bridge model. The first extension is the cryptographic separation of VLANs over trunk links. A LAN segment type referred to as an encapsulated LAN segment is introduced. All frames on such a segment are encapsulated according to an encryption and authentication code scheme. The second extension is the division of a trunk port into inbound and outbound ports. The third extension is a protocol that automatically infers for each outbound port in a bridged VLAN, a set of LAN segment types for the port that minimizes the number of transfers between encapsulated and unencapsulated segments required to transport a frame in the bridged VLAN.

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