Nonsubvertible security displays especially for page printers

Details Nonsubvertible security displays especially for page printers Nonsubvertible security displays especially for page printers

G - Physics

09

G

375/12, 354/236.

G09G 5/00 (2006.01) G06F 17/21 (2006.01) G06K 15/00 (2006.01)

Patent

CA 2021825

NONSUBVERTIBLE SECURITY DISPLAYS ESPECIALLY FOR PAGE PRINTERS Abstract of the Disclosure Display system having security features that prevent a casual user from modifying or interfering with the printing of security information. The system is arranged to have two display areas, one fitting the size of the display medium and the other, usually smaller and located within the first, where information can be displayed without restriction. The information outside the inner area can only be displayed in conformance with a protocol requiring a special authorization. Thus, anything displayed outside the inner area cannot be cancelled or overwritten. One protocol is the use of security overlays.

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