Key distribution in public communication networks taking account of security gradations
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jun 1, 1993
Grant Date -
N/A
app pub date -
Dec 12, 1991
filing date -
Jun 16, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A public communication system for a plurality of communication services (ISDN) has an arrangement for the authentification of the subscriber stations (TLN A, TLN B) for the key transmission. For a first security level this authentification arrangement has an arrangement for monitoring the time frame (24) of the key transmission and/or an arrangement (A) for the indication of the agreed key in reduced form at the subscriber end, and for a second security level a key management station (SMZ) for authenticated traffic handling
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