An Enhancement in Security and Copyright Protection Technique Used for Digital Still Image

Digital communication facilitates us to transmission of data from transmission station to receiver station. Digital data required different multimedia techniques for transferring and maintaining the quality of digital data. As we know that, digital data are in various formats like text, audio, video, image, graphics, and message or in animated format. During transmission of digital data through channel, digital data requires of security as well as copyright protection. In this paper, 2-D digital still image is used for experimental purpose. There are variety of techniques and algorithms which can provide security and copyright protection services. The combination of DWT and DCT digital watermarking technique is used to provide copyright protection service and security services can be provided by AES technique using 256 bits key. The Combination of digital image watermarking and AES technique provides authenticity, copyright protection, and security to digital image against different attacks like Cropping, Gaussian noise, Salt and pepper noise, JPEG compression, Median filtering and Rotation attack.