Describe The Difference Between Steganography And Steganography

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Security of information becomes one of the most important factors of information technology and communication because of the huge rise of the World Wide Web and the copyrights laws. Cryptography was originated as a technique for securing the confidentiality of information. Unfortunately, it is sometimes not enough to keep the contents of a message secret, it may also be necessary to keep the existence of the message secret and the concept responsible for this is called steganography [2]. Steganography is the practice of hiding secret message within any media. Most data hiding systems take advantage of human perceptual weaknesses. Steganography is often confused with cryptography because the two are similar in the way that they both are used to protect secret information. If both the techniques: cryptography and steganography is used then the communication becomes double secured [2].The main difference between Steganography and cryptography is that, cryptography concentrates on keeping the contents of a message secret while steganography concentrates on keeping the existence of a message secret. ASCII Conversion & cyclic mathematical function based…show more content…
In the first unit, they decomposed the image to be watermarked in to four dimensional modified DWT coefficients, by adding pseudo-random codes at the high and middle frequency bands of the DWT of an image. In the second unit, a key has been generated from LHLH frequency bands of the 4-Level DWT image and this key is watermarked in to the original gray image. In the third unit, for data compression we used bit plane slicing technique where the original gray image is sliced in to 8 planes and we used bit plane 3 to embed in to the key watermarked image. The embedded key watermarked image is transmitted and the key watermarks are extracted with
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