steganography


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steganography

[‚steg·ə′näg·rə·fē]
(computer science)
The art and science of hiding a message in a medium, such as a digital picture or audio file, so as to defy detection.

steganography

(security)
Hiding a secret message within a larger one in such a way that others can not discern the presence or contents of the hidden message. For example, a message might be hidden within an image by changing the least significant bits to be the message bits.

[Chaffing and Winnowing: Confidentiality without Encryption, Ronald L. Rivest, MIT Lab for Computer Science, 1998-03-22].

steganography

Hiding a message within an image, audio or video file. Used as an alternate to encryption, it takes advantage of unused bits within the file structure or bits that are mostly undetectable if altered. A steganographic message rides secretly to its destination, unlike encrypted messages, which although undecipherable without the decryption key, can be identified as encrypted. For a white paper on the subject written by Neil F. Johnson of George Mason University, visit www.jjtc.com/Steganography. See ScramDisk and social steganography.
References in periodicals archive ?
Steganography embeds an image within another cover image in such a way that the intruder cannot identify the existence of the input image from the embedded image [2].
There are two important factors that every successful and powerful steganography system should take into consideration; these factors are the hiding efficiency and the hiding payload.
(2014) Principles and Overview of Network Steganography. IEEE Communication Magazine, 52, 225-229.
Image steganography is the driving force among the steganography algorithms that make use of different multimedia carriers since the image is the most common form that is shared and transferred in both social media and e-mail environments.
Steganography is the art of information hiding (Siper & al, 2005).
Atta-ur-Rahman Naseem, "Changing Slope Method: A Novel Technique for Digital Audio Steganography," J.
Zhang and Wang [21] proposed exploiting modification direction (EMD) steganography. The main goal in it is that a group of secret bits is converted to a digit in (2n+1)-ary notational system, where n is the size of pixel block.
Steganography has its own mechanism in data protecting [1, 2].
In recent years, many methods have been proposed for steganography and steganalysis, such as coverless information hiding [9], steganography, and steganalysis based on deep learning [10,11].
Thus, it is established that both cryptography and steganography together can used to protect medical information in digital form.