నైరూప్య

Survey on Different Methods of Image Steganography

Palak R Patel, Yask Patel

With the rapid advance in digital network, digital libraries, and particularly WWW (World Wide Web) services, we can retrieve many kinds of images on personal and mobile computer anytime and anywhere. At the same time, secure image archiving is becoming a major research area because the serious concern is raised about copyright protection and authority identification in digital media. A more sophisticated technique is required for future multimedia copyright protection. Steganography is the idea of hiding private or sensitive data or information within something that appears to be nothing out of the normal. Steganography and cryptology are similar in the way that they both are used to protect important information. Nowadays the term “Information Hiding” relates to both watermarking and steganography. This paper intends to give an overview of image steganography and various techniques like Discrete Cosine Transform (DCT), Discrete Wavelet Transform (DWT), Least Significant Bit (LSB), Hash LSB and Spread Spectrum.