04424414 is referenced by 324 patents and cites 1 patents.

A cryptographic system transmits a computationally secure cryptogram that is generated from a secret transformation of the message sent by the authorized transmitter; the cryptogram is again transformed by the authorized receiver using a secret reciprocal transformation to reproduce the message sent. The secret transformations use secret cipher keys that are known only by the authorized transmitter and receiver. The transformations are performed with nonsecret operations, exponentiation, that are easily performed but extremely difficult to invert. It is computationally infeasible for an eavesdropper either to solve known plaintext-ciphertext pairs for the secret cipher keys, or to invert the nonsecret operations that are used to generate the cryptogram.

Title
Exponentiation cryptographic apparatus and method
Application Number
5/901770
Publication Number
4424414
Application Date
May 1, 1978
Publication Date
January 3, 1984
Inventor
Stephen C Pohlig
Acton
MA, US
Martin E Hellman
Stanford
CA, US
Agent
Flehr Hohbach Test Albritton & Herbert
Assignee
Board of Trustees of the Leland Stanford Junior University
CA, US
IPC
H04K 9/00
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