Packet processing device and mobile computer with reduced packet processing overhead
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 29, 2001
Grant Date -
N/A
app pub date -
Oct 20, 1997
filing date -
Oct 18, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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 processing device is received, where the packet has a packet processing key to be used in a prescribed packet processing with respect to a data portion of the packet, and the packet processing key is encrypted by using a first master key shared between a last device that applied a cipher communication related processing to the packet and the packet processing device. Then, the packet processing key in the received packet is decrypted, without carrying out the prescribed packet processing with respect to the data portion of the packet, and the decrypted packet processing key is re-encrypted by using a second master key shared between a next device to apply the cipher communication related processing to the packet and the packet processing device. Then, the packet with the re-encrypted packet processing key encoded therein is transmitted toward a destination of the received packet.
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