Generic encryption technique for communication networks

Details Generic encryption technique for communication networks Generic encryption technique for communication networks

H - Electricity

04

K

H04K 1/00 (2006.01) H04L 9/00 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2045960

GENERIC ENCRYPTION TECHNIQUE FOR COMMUNICATION NETWORKS ABSTRACT OF THE DISCLOSURE A method and related cryptographic processing apparatus for handling information packets that are to be cryptographically processed prior to transmission onto a communication network, or that are to be locally cryptographically processed and looped back to a node processor. A special cryptographic preamble is included in each information packet that is to be subject to cryptographic processing. The cryptographic preamble contains an offset value pointing to the starting loca- tion of information that is to be processed, and com- pletely defines the type of cryptographic processing to be performed. The cryptographic processor can then per- form the processing a specified in the preamble with- out regard to a specific protocol. If the packet is to be transmitted onto the network, the preamble is stripped from the packet after cryptographic process- ing, so that the formats of packets transmitted onto the network will be unaffected by the preamble. Crypto- graphic processing modes include encryption of data for outbound transmission, encryption of a cipher key for loopback to the node processor, encryption or decryp- tion of data for loopback to the node processor, and computation of an integrity check value for loopback to the node processor.

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