...ssage should be retrieved at the output side.It should be designed in such a way that user should be able to understand it easily . Compared to existing systems the performance of our proposed algorithm should be better i.e it should be robust, the capacity of message that could be hided in the image should be more and no one should be able to find any difference in the stego image and the original image
Steganography is ‘‘covered writing’’. Steganography is the hiding of a secret message within an ordinary message and the extraction of it at its target. Steganography takes cryptography a step farther by hiding an encrypted message so that no one guess it exists. Ideally, anyone scanning your data will fail to know it contains encrypted data.
Steganography has been utilized as a part of different structures for a long time. It has discovered use in differently in military, conciliatory, individual and licensed innovation applications. Quickly expressed, steganography is the term connected to any number of procedures that will conceal a message inside an item, where the shrouded message won 't be clear to an eyewitness. This paper will investigate steganography from its most punctual occurrences through potential future application. Steganography, originating from the Greek words steganos, which means rooftop or secured and graphic which implies composing, is the workmanship and art of concealing the way that correspondence is occurring. Utilizing steganography, you can insert a
In this paper we have obtainable various aspects for digital watermarking like introduction, outline, techniques, and applications. Separately from it a brief and relative analysis of watermarking techniques is presented with their advantages and disadvantages which can help the new researchers in these areas. We also tried to classify the digital watermarking in all the known aspects like robustness, perceptivity, purpose, watermark type, domain, and detection process. In this paper we tried to give the whole information about the digital watermarking which will help the new researchers to get the maximum awareness in this domain.
Murphy, S.D. 2004. “Steganography--the New Intelligence Threat.” Marine Corps War College, Marine Corps University, Marine Corps Combat Development Command. Quantico: VA. http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA520517 (accessed November 31, 3013).
The word steganography comes from the Greek name “steganos” which means hidden or secret, and the word graphy, which means writing or drawing. Put them together, and it literally translates to mean “hidden writing” (Richer, 2010). According to Dictionary.com, steganography is “the art of writing in cipher, or in characters, which are not intelligible except to persons who have the key; cryptography.” In the modern use of the word, steganography means the practice of hiding messages within larger messages so that others cannot detect what the message contains, or even that the message is there. It replaces redundant bits in images or other media with secret information from the hidden message. The redundant bits are used because they can be changed without making a noticeable change in the image or sound file.
Codes have been around for centuries ranging from wax, invisible ink, Morse code, the Enigma used by the Germans during World War II and now steganographic. Steganography is the latest form to insidiously hide information over the Internet without a trace of a file being altered. You are able to hide messages within images, voice or music. Steganography is an ancient method of hiding messages. Today messages are hidden in images and music. Steganography can be traced back to the ancient Greek who would write messages on tablets and cover them in wax. This made the tablets look blank and unsuspicious (Kolata, F4). Citizens of ancient civilizations would tattoo messages on their shaved heads. They would then let their hair grown in and travel across enemy lines to deliver the message (Seper, G1). During World War II the Allies placed a ban on flower deliveries with dates, crossword puzzles and even report cards (Kolata, F4) for fear of a message being hidden with in. Steganographers first alter their data by using encryption and then place the image into a pre-select image. Steganographers look for a piece of code that would be the least significant and look the least altered to the human eye (Kolata, F4), being as inconspicuousness and random as possible. This makes the messages undetectable unless you knew that there is a message hidden and you were able to crack the code.
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