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Dual Layer Data Hiding Using Cryptography and Steganography
Digital communication has become an essential part of society. Nowadays, a lot of applications are internet based and it is important that communication be made faithful and secret. Steganography and Cryptography are two popular ways of information exchange in a secret way. Steganography hides the existence of the message and the Cryptography distorts the message itself. Using Cryptography, the data is transformed into some other garbage form and then the encrypted data is transmitted. In steganography, data is embedded in a digital file (cover, normally image or video) and the digital file is transmitted. If secrete message converted to cryptography it will result in garbage form and always comes under suspect to be have a hidden data. If secrete message is hide in other digital cover using steganography, then it might be identified by steganalysis tools. In either ways, weather cryptography or steganography is used, though it is always chance that hidden message is getting detected. In order to make faithful and secure communication, a dual layer hiding technique is proposed in this paper.
Keywords
Steganography, Cryptography, DCT, Public Key, Private Key.
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