A METHOD FOR EMBEDING AND DETECTING HIDING CODES

A method for embeding and detecting the hiding codes, wherein, the method for embeding the hiding codes comprising: a type of format deformation being looked as one channel, selecting at least one of the channels to represent the hiding codes which is to be embeded into a document, each type of format distortion includes N-level distortions, wherein N is a positive integer greater than or equal to 2,and the number N of the different format deformations can be same or different; Determining the hiding code sequence for the hiding code with respect to each type of the format deformation, the code length after being converted is M, wherein the M is a positive integer; K words which are require to be format deformed are selected from said document including words, wherein K is positive integer and K=M; These selected K words are format deformed based on the determined code sequence. Hiding information according to the present invention is easy to be operated and handiness. With respect to the electronic document