Sheets for concealing information recorded on recording paper fo

Details Sheets for concealing information recorded on recording paper fo Sheets for concealing information recorded on recording paper fo

1991-11-06

1993-11-02

Barron, Jr., Gilberto

Cryptography

Key management

Having particular key generator

283101, 283901, H04N 144, B42D 1500

Patent

active

052590313

ABSTRACT:
In concealment sheets for information recording paper, adhered to the same, such as facsimile recording paper or the like, for the purpose of concealing information displayed on the information recording paper, a transparent protective layer for protecting the information displayed on the information recording paper is provided on at least one surface of a sheet base, and the protective layer is peeled away from the sheet base and then can be moved to the side of the information recording paper after it is adhered to the information recording paper. With the above construction, deterioration of the information, such as the deterioration of the characters displayed on the facsimile recording paper or the like, can be prevented. The paper can be prevented from curling by stiffening the facsimile recording paper. What is more, falsification of displayed information can be prevented.

REFERENCES:
patent: 5001749 (1991-03-01), Iggulden et al.
patent: 5085469 (1992-02-01), Castro

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