| 摘要 |
The present invention relates to a method for secured facsimile transmission of a document, comprising the steps of generating at least one image of said document (step a)), reading the pixels of said at least one image into a series of blocks of predetermined size (step b)), converting said series of blocks into a character string based on a conversion table (step c)), encrypting said character string to create an encrypted character string (step d)), compressing said encrypted character string to create a scrambled image (step e)), and transmitting said scrambled image (step f )), wherein an option between a standard encryption mode and an optimized encryption mode is provided, wherein in the standard encryption mode in step a) one image is generated from the entire document and in the optimized encryption mode in step a) a series of images is generated, each image corresponding to one line of the document, in step b) the pixels of each image of said series of images are read into a series of blocks of predetermined size, in step c) said series of blocks corresponding to each image are each converted into a character string, resulting in one character string per image, and in step d) only character strings corresponding to images with at least one non- white pixel are encrypted. The present invention relates further to an apparatus for performing the method of the invention. |
