Video display unit

Details Video display unit Video display unit

1987-02-13

1989-01-03

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 17, 380 18, H04N 7167

Patent

active

047962984

ABSTRACT:
A video display unit is described in which the display is divided into segments, and the order of scanning within each segment is scrambled. A segment may consist, for example, of a row or characters. The scrambling eliminates or reduces the risk of eavesdropping on electromagnetic radiation from the video signal.

REFERENCES:
patent: 4245246 (1981-01-01), Cheung
patent: 4405942 (1983-09-01), Block et al.
patent: 4669117 (1987-05-01), Van Eck

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