steganography - PRESENTED BY, Ashwini J. sushma k.

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PRESENTED BY, Ashwini J. sushma k. Ashwini_friend.2006@yahoo.com sushmakusuma@yahoo.com 2 nd year CSE S.R engineering college Ananthasagar
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Contents: Abstract Introduction History Terminologies How does it works Types of steganography Detecting steganography Embeding data Uses of steganography Digital watermarking Future and Conclusion Abstract Steganography (A Rough Greek Translation Of The Term Steganography Is Secret Writing) Has Been Used In Various Forms For 2500 Years. It Has Found Use In
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Variously In Military, Diplomatic, Personal And Intellectual Property Applications. Briefly Stated, Steganography Is The Term Applied To Any Number Of Processes That Will Hide A Message Within An Object, Where The Hidden Message Will Not Be Apparent To An Observer. For Years, People Have Devised Different Techniques For Encrypting Data While Others Have Attempted To Break These Encrypted Codes. Steganography Is A Technique That Allows One To Hide Binary Data Within An Image While Adding Few Noticeable Changes. For Hiding Secret Information In Images, There Exists A Large Variety Of Steganographic Techniques Some Are More Complex Than Others And All Of Them Have Respective Strong And Weak Points. Different Applications Have Different Requirements Of The Steganography Technique Used. For Example, Some Applications May Require Absolute Invisibility Of The Secret Information, While Others Require A Larger Secret Message To Be Hidden. Our Paper Briefly Describes About The Various Techniques Used In Steganography Along With The Types Of Steganography And How It Works. Introduction ‘Steganos’ means “covered”, Graphos means “writing or drawing” Steganography, a word derived from Greek meaning “covered writing” .The hiding of a secret message inside another message so that no one can detect or decode the secret message is called steganography. Steganography is used in espionage – both corporate and in the intelligence industry, the entertainment industry for copyright purposes, and there is speculation that terrorists use it for some means of communication as well. History
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1. Wax tablets : Its use goes back to ancient Greece with the use of wooden tablets coated in wax called wax tablets . For normal use, the Greeks would inscribe messages in the wax, making it a reusable media. However, to pass a hidden message, the Greeks would strip the wax off of the tablet; write a message on the wood beneath the wax, then cover the wood with wax making it appear as though it were a blank wax tablet. 2. Shave a messenger’s head: Another method to hide a message was to shave a messenger’s head , tattoo a message on his shaved head, let his hair grow back and send the messenger on his way. 3. Invisible ink:
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steganography - PRESENTED BY, Ashwini J. sushma k.

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