Patent ID: 6839844

Claim:
An image data encryption device comprising: a memory means connected to a display and peripheral devices; an image data display means connected to said memory means for displaying one or more sets of image data; a partial image data selection means connected to said memory means for storing diagonal coordinates of each of rectangles so as to select one or more arbitary portions of each of said sets of image data as said rectangles; and an encryption means connected to said memory means for encrypting each of said selected portions using said diagonal coordinates and for embedding each of said encrypted portions in each of said selected portions of each of said sets of image data; and wherein further comprising said encryption means connected to said memory means for embedding each of said encrypted portions in each of said selected portions of each of said sets of image data using one of values of said diagonal coordinates and storing said diagonal coordinates of each of said embedded encrypted portions in cases where said encrypted portions are larger than said selected portions and said one value of said diagonal coordinates of each of said selected portions is equal to said one value of said diagonal coordinates of each of said embedded encrypted portions.