Analysis of Different Types of Steganography

Modern era of digital communication raise many challenges in secrecy of data when it is transferred over the network. The data to be transferred over the network can be grabbed by third party on the way. Steganography is a method to hide secret data from third party. The secret data is embedded in some cover media in such a way that no one else is aware of it. Different cover media are available such as text files, image files, audio and video files etc. images are widely used as cover media. The secret data is embedded using various techniques available such as Least Significant Bit (LSB) insertion, Discrete Cosine Transform (DCT), Discrete Wavelet Transform (DWT) etc. But each of these techniques has its own strengths and weaknesses. This paper analyses different types of steganography and the techniques used to achieve those types of steganography.