Digital watermarking technology is a frontier research field and it serves an important role in information security. According to the analysis of the definition and basic characteristics of digital watermarking technology, the system model of digital watermarking is given. As an emerging technology, digital watermarking involves the ideas and theories of different subject coverage, such as signal processing, cryptography, probability theory and stochastic theory, network technology, algorithm design, and other techniques. Digital watermarking hides the copyright information into the digital data through certain algorithm. The secret information to be embedded can be some text, author‘s serial number, company logo, images with some special importance. This secret information is embedded to the digital data (images, audio, and video) to ensure the security, data authentication, identification of owner and copyright protection. The watermark can be hidden in the digital data either visibly or invisibly. The basic principles of digital watermarking technology means that the digital watermark information has a certain significance in the premise does not affect the value of the embedded covertly through a different approach to digital data processing work to become part of the work cannot be separated from the carrier. In the research, we have implemented the DWT and DCT along with proposed hybrid method of watermarking. The proposed hybrid method of watermarking improved the performance, security and efficiency as compared to existing methods. The results are also analyzed on the basis of performance parameters.
Steganography; DCT, DWT, LSB, Stego image PSNR, MSE.