A packet processing and packet transfer scheme capable of reducing the packet processing overhead by eliminating a need to decrypt and re-encrypt the entire packet at a time of relaying encrypted packets. In a packet processing device for relaying encrypted packets, a packet transferred to the packet...http://www.google.com.au/patents/US6240514?utm_source=gb-gplus-sharePatent US6240514 - Packet processing device and mobile computer with reduced packet processing overhead
