Abstract: “Digital watermarking is emerging as effective technique to protect copyrights. The propose paper present a novel technique to protect digital data by embedding encrypted watermark. In this technique discrete wavelet transform is used to embed the watermark image. Each pixel value is encrypted by using stream cipher and the key used is same for encryption and decryption. Key security is essential to protect digital data from unauthorized access. Experimental results verify that the proposed technique performs better and it can withstand compression attack.”

Keywords: Grey image, DWT, Image encryption. Stream cipher, digital water marking