Computing Practices Exploring Steganography: …

Computing Practices Exploring steganography : Seeing the unseen steganography is an ancient art of hiding information. Digital technology gives us new ways to apply steganographic techniques, including one of the most intriguing . that of hiding information in digital images. S. Neil F. Johnson teganography is the art of hiding informa- (with the exception of JPEG images). All color varia- tion in ways that prevent the detection of hid- tions for the pixels are derived from three primary col- Sushil Jajodia den messages. steganography , derived from ors: red, green, and blue. Each primary color is George Mason University Greek, literally means covered writing. represented by 1 byte; 24-bit images use 3 bytes per It includes a vast array of secret communi- pixel to represent a color value. These 3 bytes can be cations methods that conceal the message's very represented as hexadecimal, decimal, and binary val- existence. These methods include invisible inks, ues. In many Web pages, the background color is rep- microdots, character arrangement, digital signatures, resented by a six-digit hexadecimal number actually covert channels, and spread spectrum communica- three pairs representing red, green, and blue.

26 Computer Exploring Steganography: Seeing the Unseen S teganography is the art of hiding informa-tion in ways that prevent the detection of hid-den messages.

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  Computing, Practices, Exploring, Unseen, Genesis, Steganography, Computing practices exploring steganography, Exploring steganography, Seeing the unseen s teganography, Teganography

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