System and scheme of cipher communication

Details System and scheme of cipher communication System and scheme of cipher communication

1994-10-06

1997-02-04

Barron, Jr., Gilberto

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 48, 380 49, H04L 912

Patent

active

056007221

ABSTRACT:
A cipher communication system and scheme capable of realizing the cipher communication without affecting the already existing application programs and hardware, and establishing a synchronization at the start and end of the cipher communication. In the cipher communication, the session key generated by the key distribution center are obtained and shared at the first and second terminals at a timing of a request for establishing a cipher communication session between the first and second terminals, and then the cipher communication between the first and second terminals is carried out by using the shared session key. The synchronization at the start and end of the cipher communication is established by the matching of the synchronization data transmitted from the first terminal to second terminal or its enciphered form with the return data from the second terminal to the first terminal which is either the synchronization data as received at the second terminal, or its enciphered form depending on the communication state of the second terminal.

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Technical Report of IEICE, of 592-3 (1992-11) entitled, "Key Distribution Procedure Using ISDN User-to-User Signalings" by Kuro Oyaizu & Kiyoto Tanaka.
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