Abstract: Image steganography is applicable in defence, police department, detective investigation department and medical field. In this paper we give a review on various techniques in image steganography. Nowadays internet technologies need a very strong level of security during data transmission. We can achieve it by steganography. Integer wavelet transform, list significant bit are some techniques used in image steganography. The results of such reviews of various methodologies are to get an efficient analogy to create a much better techniques for image steganography.

Keywords: Steganography, Cryptography. DWT, IWT.