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 ?
A competent detection program would conclude that there was a steganographic message hidden in the carrier bytes.
A steganographic method for images by pixel-value differencing.
High payload and high image quality of the secret images and for the stego image was the target of proposed steganographic scheme.
Efficiency of a steganosystem is determined by efficiency of the steganographic algorithm used by it.
5], based on the Chinese remainder theorem (CRT) combined the steganographic and authentication techniques to create a scheme that significantly promotes the visual quality of stego-images and enhances the ability to authenticate.
She further informed that the steganographic program was activated by pressing control-alt-E and then typing in a 27-character password, which the FBI found written down on a piece of paper during one of its searches.
A secure steganographic system is shown in Figure 1, which depicts step by step process of hiding process of concealed message on a cover medium.
Detection of distributed steganographic information in social networks.
Analysis of steganographic techniques and steganalysis in hidden channels.
Figure 1 shows a common taxonomy of steganographic techniques (Arnold et al.
Once this is accomplished, the implementation structure of steganographic algorithms can be atomically examined by comparing and contrasting such attributes as file and message size, the consistency of the most significant bit, and character location and distribution techniques.
A computer forensic consultant found a copy of what is called a steganographic program.