Cryptography – Key management – Having particular key generator
Patent
1992-04-29
1994-01-18
Gregory, Bernarr E.
Cryptography
Key management
Having particular key generator
380 9, 380 50, H04L 900
Patent
active
052805298
ABSTRACT:
A secure communications network having different types of subscriber terminals (1-4) and switching modules (7-8) connected to other switching modules in the network includes cryptographic devices (13-15) where at least one of the cryptographic devices is a cryptographic-pool device having a number of cryptographic modules (35) wherein the cryptographic-pool device is physically separated from the switching modules (7,8), and wherein at least one of the cryptographic-pool devices (13-18) is within a security guard (9 or 10) connected between a switching module (7 or 8) and the network. A security guard may include routing devices (32,31) or handling control signals that specify protection criteria. A managing device (30) may also be included within a security guard for deciding the manner for carrying a communication channel through the security guard and for setting out rules for governing security-guard decision-making. The managing device may be selectively controlled both on-line and off-line.
REFERENCES:
patent: 4802220 (1989-01-01), Marker, Jr.
patent: 5115466 (1992-05-01), Presttun
"Encryption and ISDN-A Natural Fit" by B. O'Higgins, et al, pp. 863-869, International Switching Symposium 1987, Innovations in Switching Technology, Phoenix, Ariz., Mar. 15-20, 1987.
"Security Measures in Communicaiton Networks", K. Presttun, Electrical Communication, vol. 60, No. 1, 1986, pp. 63-70.
"Information Protection in the Swedish ISDN", K. Erlandsson et al, Proceedings of the International Switching Symposium, May 27-Jun. 1, 1990, vol. III, pp. 53-57.
Alcatel STK A/S
Gregory Bernarr E.
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