Method for providing mutual authentication of a user and a serve

Details Method for providing mutual authentication of a user and a serve Method for providing mutual authentication of a user and a serve

1993-12-14

1995-07-18

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 9, 380 21, 380 23, 380 49, 380 50, H04L 932, H04L 900, H04L 908

Patent

active

054349184

ABSTRACT:
An authentication method that permits a user and a file serving workstation to mutually authenticate themselves. This is accomplished by exchanging a random number that is encrypted by a password that is known to the user and stored in a password file on the file serving workstation. A logon ID is sent from the client workstation to the server workstation. The stored user password corresponding to the user ID is retrieved from the password file. A random number is created that is encrypted by a symmetric encryption algorithm on the server workstation using the retrieved user password, and which provides an encrypted password. The user is then requested to enter the password into the user workstation. The entered password is used to decrypt the encrypted password received from the server workstation and retrieve the random number therefrom to authenticate the server workstation. The random number is then used as the encryption and decryption key for communication between the user and server workstations. An encrypted message is transmitted using the random number from the client workstation to the server workstation. The encrypted message is decrypted at the server workstation to authenticate the user.

REFERENCES:
patent: 4386233 (1983-05-01), Smid et al.
patent: 4453074 (1984-06-01), Weinstein
patent: 4529870 (1985-07-01), Chaum
patent: 5241594 (1993-08-01), Kung
patent: 5249230 (1993-09-01), Mihm, Jr.

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