Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1988-06-03
1989-10-24
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 49, 379 95, 34082531, 34082534, H04L 900
Patent
active
048767174
ABSTRACT:
This adjunct processor arrangement performs a centralized call screening function to provide computer port access security. Every call origination in the telephone switching system from a calling party to a protected computer port is interdicted by the telephone switching system and routed to the adjunct processor. The calling party receives a series of prompts from the adjunct processor to provide identification information, such as login, password, and voiceprint information. The adjunct processor validates the identity of the calling party using this identification indicia and initiates a callback operation. The adjunct processor disconnects the calling party from the connection, calls the calling party back and then uses the data call transfer capability of the telephone switching system to connect the calling party to the computer.
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Barron Salvador
Coffman James E.
American Telephone and Telegraph Company
AT&T Information Systems
Buczinski Stephen C.
Gregory Bernarr Earl
Watland Ross T.
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