Adaptive digital watermark embedding and extracting method of disguise Science Program

The present invention provides a method of extracting a watermark embedding method and a digital watermark embedding method of the adaptive algorithm to learn camouflage, the main step comprises: constructing a plurality of sets of both camouflage properties and identifying attributes related to the operation of the sub-program; set to a sub-program each index number in ascending order, to give an initial program sequence; BKDR calculated hash value of the key information and to sort operator of the program sequence to obtain an initial sub-sequence adaptive scheme; order to embed watermark information according to an adaptive loop scheme sequence Listing . It has the advantage that the positioning of tampering function, and the application of technology to achieve the camouflage robust security enhancements target document formatted text watermark, the watermark information to solve common method for formatting text watermark embedded watermark by adjusting the format of the resulting Yi It was illegally extracted and then to crack the problem.