Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1992-06-03
1994-11-29
Cangialosi, Salvatore
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 23, 380 25, H04L 908
Patent
active
053697057
ABSTRACT:
A method and apparatus for providing authentication among a dynamically selected group of users in a communication system with a dynamically changing network topology. With this invention, freshness information and alleged identity information are transmitted from each of the users in the group using available paths in the network. A group key is then generated, and coded information, derived from the group key and the above transmitted information, is sent to each of the users. Each unit of coded information is accompanied by an identifying tag so as to identify which of the users is to use the appropriate unit of coded information. Each alleged user will then extract the group key from a corresponding coded information unit only if it shares an appropriate secret with a server. Without knowledge of the group key, a user cannot be authenticated.
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Bird Raymond F.
Herzberg Amir
Janson Philippe A.
Kutten Shay
Molva Refik A.
Cameron Douglas W.
Cangialosi Salvatore
International Business Machines - Corporation
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