Cryptography – Cryptanalysis
Patent
1985-12-24
1990-02-13
Buczinski, Stephen C.
Cryptography
Cryptanalysis
380 25, 380 49, 3408255, 34082552, 370 60, 455 1, 455 58, H04L 1116, H04L 1126
Patent
active
049013483
ABSTRACT:
An arrangement for securing data transmissions to and from one data device from among a plurality of data devices sharing a common interface is disclosed. In a data communication network, a master communication bus connects to a plurality of data transmitting and receiving devices via a single interface. The disclosed arrangement provides circuitry in the common interface which generates a jamming signal to all devices connected to the interface except for that one device which is either transmitting or receiving a data-transmission. The jamming signal inhibits all the connected devices from monitoring and detecting the data transmission processes of the interface. The one transmitting and receiving device is enabled to either transmit or receive data during the generation of the jamming signal which ensures a secure data transmission and prevents "eavesdropping" by the other devices. The jamming signal is removed at the conclusion of the data transmission to or from the one device.
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Nichols John M.
Windhausen Richard A.
American Telephone and Telegraph Company
AT&T Information Systems Inc.
Buczinski Stephen C.
Gregory Bernarr Earl
Watland Ross T.
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