H - Electricity – 04 – K
Patent
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.
Gupta Amar
Hawe William R.
Kaufman Charles W.
Spinney Barry A.
Tardo Joseph J.
Digital Equipment Corporation
Smart & Biggar
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