Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1982-04-05
1988-01-19
Cangialosi, Salvatore
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 25, 380 46, H04L 902
Patent
active
047208597
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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Aaro Tore I.
Blom Rolf J.
Fak Viiveke A.
Forchheimer Robert
Ingemarsson Bror I.
Cangialosi Salvatore
Cannon, Jr. James J.
Haken Jack E.
U.S. Philips Corporation
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