Public key cryptographic apparatus and method

Details Public key cryptographic apparatus and method Public key cryptographic apparatus and method

H - Electricity

04

L

340/70

H04L 9/00 (2006.01) H04K 1/00 (2006.01) H04L 9/30 (2006.01)

Patent

CA 1128159

PUBLIC KEY CRYPTOGRAPHIC APPARATUS AND METHOD Abstract of the Disclosure A cryptographic system transmits a computationally secure cryptogram that is generated from a publicly known transformation of the message sent by the transmitter; the cryptogram is again transformed by the authorized receiver using a secret reciprocal transformation to reproduce the message sent. The authorized receiver's transformation is known only by the authorized receiver and is used to generate the transmitter's transformation that is made publicly known. The publicly known transformation uses operations that are easily performed but extremely difficult to invert. It is infeasible for an unauthorized receiver to invert the publicly known transformation or duplicate the authorized receiver's secret transformation to obtain the message sent.

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