04288659 is referenced by 74 patents and cites 5 patents.

An improved secured data transmission system relies on the favorable comparison of coded signals derived from information about authorized individuals and particular data terminals that is both prestored and subsequently supplied under manual command in order to generate an operating key which is then used to encode and decode data that is entered after the initialization procedure.

Title
Method and means for securing the distribution of encoding keys
Application Number
6/40687
Publication Number
4288659
Application Date
May 21, 1979
Publication Date
September 8, 1981
Inventor
Martin M Atalla
Menlo Park
CA, US
Agent
A C Smith
Assignee
Atalla Technovations
CA, US
IPC
H04L 9/00
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