Hierarchical key management system

Details Hierarchical key management system Hierarchical key management system

1988-05-02

1989-12-19

Cangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, 380 49, H04L 902

Patent

active

048888010

ABSTRACT:
A hierarchical key management system includes a number of secure terminals. These terminals provide secure access to a corresponding number of users. A user inserts a security activation device or key into the secure terminal to access a secure connection through the established communication network. A group of secure wireline terminals is connected to a key certification authority. There may be several groups of key certification authorities and corresponding secure terminal users. At the highest level, a key certification center authorizes secure communications by the key certification authorities. In turn, the key certification authorities authorize secure communications between the users. As a result, if one level of key management is compromised, other levels and users are not affected.

REFERENCES:
patent: 4386233 (1983-05-01), Smid et al.
patent: 4438824 (1984-03-01), Mueller-Schloer
patent: 4458109 (1984-07-01), Mueller-Schloer
patent: 4500750 (1985-02-01), Elander et al.
patent: 4578531 (1986-03-01), Everhart et al.
patent: 4694492 (1987-09-01), Wirstrom et al.
patent: 4771459 (1988-09-01), Jansen

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