Method and apparatus for protecting the confidentiality of passw

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

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380 21, 380 25, 380 28, 380 30, H04K 100

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054974216

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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