Digital watermark encryption system based on contour wavelet transform and elliptic encryption system encryption algorithm

Abstract

The invention discloses a digital watermark encryption system based on contour wavelet transform and an elliptic encryption system encryption algorithm. At first, an author defines an individual function watermark and then stores a watermark file; secondly, the author selects points in which watermarks are embedded and an individual private key to generate a public key, and uses a public key of an elliptic encrption system encryption algorithm to encrypt the points in which the watermarks are embedded to form an encryption point sequence and store the encryption point sequence; and thirdly, the author reads an image to be encrypted and the individual watermark, and embeds the individual watermark into the image to be encrypted, wherein the transform and the inverse transform the image use contour wavelet transform, and a work with the water mark of the author is formed after the encrypted image is stored. The invention has good safety, high efficiency and low realization cost.

Description

technical field [0001] The present invention relates to an encryption system, in particular to an encryption system based on contour wavelet ( Contourlet ) transformation and elliptic encryption system ( ECC ) encryption algorithm for digital watermark encryption system. Background technique [0002] At present, with the development of the Internet, the application of digital media products is becoming more and more extensive, and the protection of digital image copyright has more practical significance. It is also becoming more and more important to effectively protect the rights and interests of copyright owners and combat piracy. Digital watermarking is one of the important methods to effectively protect multimedia copyright. It embeds specific information representing digital media copyright owners, user-specified logos or serial codes, etc., into protected works according to certain algorithms. When a copyright dispute occurs, the embedded feature information is ext...

AI Technical Summary

Problems solved by technology

[0004] In the transform domain algorithm, most of the watermark embedding is embedded in the high-frequency region of the transformation. When low-pass filtering is performed, the high-frequency information is often filtered out, and the restored watermark effect is poor.

[0005] The existing encryption algorithm generally adopts one of airspace encryption and transform domain, which has low security performance