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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) Application No.: 00751/KOLNP/2005 A
(22) Date of filing of Application: 28/04/2005 (43) Publication Date: 09/06/2006
(54) Title of the invention: BRIDGED CRYPTOGRAPHIC VLAN
(51) International classification : H04L
(31) Priority Document No : 10/286,634
(32) Priority Date : 01/11/2002
(33) Name of priority country : US
(86) International Application No and : PCT/US03/034855
Filing Date
: 30/10/2003
(87) International Publication No : WO 04/042984 A2
(61) Patent of addition to Application No : NIL
Filed on : N.A.
(62) Divisional to Application No : NIL
Filed on : N.A.
(57) Abstract:
(71) Name of Applicant:
CRANITE SYSTEMS INC
Address of the Applicant:
6620 VIA DEL ORO 2 ND FLOOR SAN JOSE CA
95119 USA
(72) Name of the Inventor:
1. VOLPANO DENNIS MICHAEL
2. ZHAO XINHUA J
Filed U/S 5(2) before The Patents (Amendment)
Act, 2005: NO
The invention comprises three extensions of the IEEE 802.1Q VLAN bridge model. The first extension is the cryptographic separation of
VLANs (28, 29) over trunk links (16). 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 (20, 21) and outbound ports (33, 32). The third extension is a protocol that automatically infers for each outbound
port in a bridged VLAN (p3, p4), 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 .
(FIG. - 2)
The Patent Office Journal 09/06/2006 11013