Image display device

Details Image display device Image display device

2006-04-25

2006-04-25

Barron, Gilberto (Department: 2132)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

Tamper resistant

C380S201000

Reexamination Certificate

active

07036021

ABSTRACT:
An authentication/decryption unit authenticates and decrypts video signals received from a video signal output device. An open-condition detector detects the open condition of a cabinet. A memory stores therein one of a first flag indicating that an authentication operation of the authentication/decryption unit is enabled and a second flag indicating that an authentication operation of the authentication/decryption unit is disabled. A micro-controller controls whether the authentication operation of the authentication/decryption unit will be enabled or disabled according to the flag in the memory. When the open-condition detector detects that the cabinet is opened, the micro-controller writes the second flag into the memory.

REFERENCES:
patent: 5912621 (1999-06-01), Schmidt
patent: 6223285 (2001-04-01), Komuro et al.
patent: 9-261217 (1997-10-01), None
patent: 11-073309 (1999-03-01), None

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