Video terminal with image line disarrangement

Details Video terminal with image line disarrangement Video terminal with image line disarrangement

1985-06-17

1987-05-26

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 18, 358140, H04N 7167, H04N 144, H04N 701

Patent

active

046691170

ABSTRACT:
Video terminal comprising electronic circuit provisions due to which the user of this terminal is protected against unwanted "remote looking-in" by other persons at the information reproduced on his screen. For that purpose the sequence in which the image lines are reproduced on the screen, is pseudo-randomly disarranged.

REFERENCES:
patent: Re31460 (1983-12-01), Dalton et al.
patent: 2879324 (1959-03-01), Hoffman et al.
patent: 3958077 (1976-05-01), Ross et al.
patent: 4405942 (1983-09-01), Block et al.
patent: 4459611 (1984-07-01), Arai et al.
patent: 4553171 (1985-11-01), Holladay et al.

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