ELECTRONIC DATA ENCRYPTION SYSTEM, DECRYPTION SYSTEM, PROGRAM AND METHOD FOR THE SAME

摘要

An electronic data encryption system provides a means for outputting electronic data on paper media in a format preventing leakage of critical information. The electronic data encryption system (200) comprises a digital image generation section (15) which generates digital images as an aggregate of pixels on the basis of electronic data, an encryption region specifying section (31) which specifies a partial region to be encrypted in the digital image generated by the digital image generation section (15), an image conversion section (32) for converting the image in the partial region into a processed image on the basis of an encryption key, a pixel value conversion section (33) which generates converted image with regularity to be used for identifying the partial region location during decryption by regularly converting the pixel value of the processed image, and an output section (12) for output of the encrypted image including the converted image. The encryption region specifying section (31) specifies the region indicated by the region specifying information for identifying the region on the digital image as a partial region to be encrypted.