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Terminal Control of Encipher and Decipher Data Operations

IP.com Disclosure Number: IPCOM000052920D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue


Related People

Ehrsam, WF Lennon, RE Matyas, SM [+details]


In communication security applications where data is to be transmitted in a cryptographic session, between a host unit and a remote terminal controller unit, a data encrypting session key (KS) is required to be established in a form suitable for use at each unit. Data may then be enciphered under KS at one unit and transmitted to the other unit where it is deciphered under KS. A method is presently disclosed for pregenerating a table of enciphered static session keys (KS(i)) as a function of random numbers (RN(i)) in such a manner that the generation process is irreversible, thereby preventing anyone from recovering KS(i) in clear form or recreating the generation process to duplicate KS(i).