Multimedia Content protection Based on Commutative Watermarking and Cryptographic Technique

Watermarking embeds information into a digital signal like images. Watermarking Technologies are being regarded as a vital mean to proffer copyright protection of digital signals. The effectiveness of watermarking and Encryption technique is indicated by the robustness of embedded watermarks against various attacks such as, Rotation, Resizing, etc. In this paper, a novel Commutative Watermarking and Partial Encryption technique using single level 2-Dimension Discrete Wavelet Transform and Multi-Map Orbit Hopping Chaotic System is proposed. In proposed system, the low-low sub-band decomposition is only encrypted. So, it is able to reduce the encryption to one quarter of the image information and the watermark image is embedded into the selected high sub-1bands. The results of the security analysis shows that the proposed algorithm provides a high security level for real time application. KeywordsChaos; Partial Encryption; Watermarking; DWT.