Device and method to render secure the transfer of data between

Details Device and method to render secure the transfer of data between Device and method to render secure the transfer of data between

1988-11-10

1990-07-10

Tarcza, Thomas H.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 23, 380 48, 380 49, 380 20, H04R 100

Patent

active

049411730

ABSTRACT:
The protection of the transfer of data between a videotex terminal (TVX) and a server (SE) is carried out by means of an additional package (BA) connected to a video adaptor connector (PPI) of the terminal (TVX). In a presession embodiment, the package acts on the switching device (AIG) of the terminal by monitoring any other action on said switching equipment. The switching cabinet and the server conduct dialogue according to a predetermined sequence of operations comprising the definition of a transmitted session key encrypted in accordance with a basic key. Any anomaly occuring during this dialogue aborts the presession mode.

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"Cryptographic Key Distribution Using Composite Keys", National Telecommunications Conference, 1978, Birmingham, Alabama, Dec. 3-6, 1978, pp. 26.1.1-26.1.2.
"Bildschirmtext braucht Datensicherheit", Nachrichtentechnische Zeitschrift Niz, vol. 36, No. 8, Aug. 1983, pp. 500-504.
"Des Key Distribution and User Identification Technique Via A Public-Key Algorithm", IBM Technical Disclosure Bulletin, vol. 24, No. 7B, Dec. 1981, pp. 3913-3915.

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