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Steganography
The art and science of writing hidden messages in such a way that no one apart from the intended recipient knows of the existence of the message; this is in contrast to cryptography, where the existence of the message is clear, but the meaning is obscured.
Steganography Revealed Over the past couple of years, steganography has been the source of a lot of discussion, particularly as it was suspected that terrorists connected with the September 11 attacks might have used it for covert communications. While no such connection has been proven, the concern points out the effectiveness of steganography as a means of obscuring data. Indeed, along with encryption, steganography is one of the fundamental ways by which data can be kept confidential. This article will offer a brief introductory discussion of steganography: what it is, how it can be used, and the true implications it can have on information security.
An Encrypto - Stego Technique Based Secure Data Transmission System This paper proposed a system that combines the effect of these two methods to enhance the security of the data. This proposed system encrypts the data with a crypto algorithm and then embeds the encrypted text in an image file. The embedding process is done with help of stego-key, and the detection or reading of embedded information is possible only having this key.
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