Image steganography in DWT domain using double-stegging with RSA encryption

The need for preserving secrecy of sensitive data has been ever-increasing with the new developments in digital communication. In this paper, we present an advanced method for embedding encrypted secret data in grayscale images to provide high level security of data for communication over unsecured channels. The proposed system combines the features of Cryptography and Steganography. Cryptography involves converting the secret message into a non-recognizable cipher. Steganography is then applied using Double-stegging to embed this encrypted data into a cover media and hides its existence.