Recently, merging signal processing techniques with information security services has found a lot of attention. Steganography and steganalysis are among those trends. Like their counterparts in cryptology, steganography and steganalysis are in a constant battle. Steganography methods try to hide the presence of covert messages in innocuouslooking data, whereas steganalysis methods try to reveal...

Steganography is the art and science of writing hidden messages in such a way that no one, excluding the sender and deliberated recipient, suspects the message existence , a form of security through obscurity. Steganography techniques can be utilized to images, a video file or an audio file. Typically, steganography is written in characters including hash marking, but its usage within images is...

In the last few time, we have seen a lot of new and powerful steganography techniques. In the subsequent paper we go over some general concepts and thoughts that are appropriate toward steganography. Specifically we found a structure and define idea of security for a steganography system and illustrate how conventional definitions do not really sufficiently cover image steganography and an offe...

Today, secure communication is the need of the society. Steganography and Cryptography are most popular techniques used for secure communication in the present era. Steganography is used hide the existence of data within some cover media like image file, audio file, video file, text file etc. But the most commonly used media for steganography is image file. There are many techniques of image st...

Steganography is defined as the science and art of writing hidden messages in such a way that no one apart from the intended recipient knows of the message existence. Due to these reasons it has become absolutely essential to keep the systems free fr om different internet attacks and take steps to eliminate any risks. Linguistic steganography, a type of steganography is defined as a collection ...

Steganography is an art of hiding secret message in an unsuspecting cover document. Over the many years many systems have been proposed for the same. With the advancement of technical know-how even the cover medium has under gone certain changes. Generally the cover mediums used include text, image, audio and video. Text steganography is one of the oldest techniques of steganography which still...

Pixel-value differencing (PVD) steganography generates step effects or abnormal high fluctuations in PVD histogram. Since steganalysis exploits these artifacts to defeat the PVD steganography, modified PVD (MPVD) steganography preserving the PVD histogram is recently presented. This paper proposes a novel steganalysis method, in which we embed message one more time into the suspicious image to ...

| Introduction | Null Ciphers| Digital Image and Audio | Digital Carrier Methods Steganography Examples | Detecting Steganography | Steganography Detection Tools | Summary and Conclusions References | Additional Websites | Companion Downloads | Commercial Vendors | Author's Bio

The rapid development of multimedia and internet allows for wide distribution of digital media data. It becomes much easier to edit, modify and duplicate digital information .Besides that, digital documents are also easy to copy and distribute, therefore it will be faced by many threats. It is a big security and privacy issue, it become necessary to find appropriate protection because of the si...