Patent ID: 7680110

Claim:
A communication device configured to receive a first packet from a first network including a virtual network, and to transmit a second packet to a second network, the communication device comprising: a receiver section configured to receive the first packet from the first network; a converter section configured to convert a destination MAC address of the first packet to a destination MAC address of the second packet using virtual network identifying information of the first packet; a selector configured to select a security parameter based at least in part on the destination MAC address of the second packet; an encryption section configured to encrypt the second packet based on the security parameter; and a transmitter section configured to multicast the encrypted second packet to the second network, wherein the first network is based on IEEE 802.3-2002, the virtual network is a VLAN based on IEEE 802.1Q-2003, the second network is based on IEEE 802.11-1999, the encryption is based on IEEE 802.11i-2004, and the destination MAC address of the second packet is comprised of at least a portion of the destination MAC address of the first packet and a portion of the virtual network identifying information of the first packet.