Method and system for the mutual encyphered indentification between data communicating stations and stations for use with such method and system
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United States of America Patent
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-
Jan 19, 1988
Grant Date -
N/A
app pub date -
Apr 5, 1982
filing date -
Apr 8, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for transmitting ciphered information between two stations while using session keys. According to the method a mutual identification of the stations (AK, A; A,B) is obtained while using an identification device (ID) comprised in each station. Number values (r.sub.1, r.sub.2), originating from each station, may be exchanged by said identification in a form which is so ciphered that the number values may be recovered by the counterpart only. The session key (t.sub.m) is formed on basis of said number values in a modification device (MODIFI). Ciphered data messages are exchanged between the station using the established session key and a message ciphering/deciphering device (MCRY, MDECRY) comprised in each station. According to the method the mutual identification and the establishment of the session key via an open channel may be obtained by transmitting one separate identification sequence in each direction.
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