Selective encryption of mixed raster content layers

Details Selective encryption of mixed raster content layers Selective encryption of mixed raster content layers

2005-10-11

2005-10-11

Barrón, Jr., Gilberto (Department: 2132)

Cryptography

By modifying optical image

C380S216000, C382S302000

Reexamination Certificate

active

06954532

ABSTRACT:
What is disclosed is an image path for work flow or printing in which a scanner or image editor produces a raster image. The raster image is segmented into a background plus a plurality of objects represented as foreground, mask pairs (henceforth the background or a foreground, mask pair will be referred to as a field). Each field possesses a potentially different security level. Each security level corresponds to a public encryption key used to encrypt each layer with its corresponding security level. A publicly known file storage and transmission format that supports mixed raster content is used to store or transmit the raster image. Upon retrieval or reception, a viewer enters in a private key into a user interface. The private key can only decrypt that content to which the viewer is authorized.

REFERENCES:
patent: 4912761 (1990-03-01), Tan et al.
patent: 5372387 (1994-12-01), Wajda
patent: 5748780 (1998-05-01), Stolfo
patent: 5812989 (1998-09-01), Witt et al.
patent: 6031575 (2000-02-01), Suzuki et al.

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