04227253 is referenced by 126 patents and cites 6 patents.

A communication security system for data transmissions between different domains of a multiple domain communication network where each domain includes a host system and its associated resources of programs and communication terminals. The host systems and communication terminals include data security devices each having a master key which permits a variety of cryptographic operations to be performed. When a host system in one domain wishes to communicate with a host system in another domain, a common session key is established at both host systems to permit cryptographic operations to be performed. This is accomplished by using a mutually agreed upon cross-domain key known by both host systems and does not require each host system to reveal its master key to the other host system. The cross domain key is enciphered under a key encrypting key designated as the sending cross domain key at the sending host system and under a different key encrypting key designated as the receiving cross domain key at the receiving host system. The sending host system creates an enciphered session key and together with the sending cross-domain key performs a transformation function to reencipher the session key under the sending cross domain key for transmission to the receiving host system. At the receiving host system, the receiving host system using the receiving cross-domain key and the received session key, performs a transformation function to reencipher the received session key fron encipherment under the sending cross domain key to encipherment under the receiving host system master key. With the common session key now available in usable form at both host systems, a communication session is established and cryptographic operations can proceed between the two host systems.

Title
Cryptographic communication security for multiple domain networks
Application Number
5/857531
Publication Number
4227253
Application Date
December 5, 1977
Publication Date
October 7, 1980
Inventor
Walter L Tuchman
Woodstock
NY, US
Jonathan Oseas
Hurley
NY, US
Carl H W Meyer
Kingston
NY, US
Stephen M Matyas
Poughkeepsie
NY, US
Richard E Lennon
Woodstock
NY, US
Lloyd L Hollis
Cary
NC, US
Robert C Elander
Saugerties
NY, US
William F Ehrsam
Kingston
NY, US
Agent
Edwin Lester
Assignee
International Business Machines Corporation
NY, US
IPC
H04L 9/00
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