Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1992-04-28
1995-05-23
Bowler, Alyssa H.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 21, 380 25, 380 28, 380 30, H04K 100
Patent
active
054188547
ABSTRACT:
Apparatus for protecting the confidentiality of a user's password during a remote login authentication exchange between a user node and a directory service node of a distributed, public key cryptography system includes a specialized server application functioning as an intermediary agent for the login procedure. The login agent has responsibility for approving the user's login attempt and distributing a private key to the user. However, the login agent is not trusted with the user's password and is therefore a "semi-trusted" node. In another aspect of the invention, a login protocol enables remote authentication of the user password without transmitting the password over the network.
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Article entitled, "Reducing the Risks from Poorly Chosen Keys" by T. Mark et al., University of Cambridge Computer Laboratory Cambridge, England, from 12th Symposium on Operating System Principles 1989 at pp. 14-18.
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Article entitled, "Authentication for Distributed Systems" by T. Y. C. Woo et al., University of Texas at Austin, from Computer, IEEE Computer Society, Jan. 1992, at pp. 49-51.
Alagappan Kannan
Gasser Morrie
Kaufman Charles W.
Lampson Butler W.
Tardo Joseph J.
Bowler Alyssa H.
Digital Equipment Corporation
Follansbee John
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