A Review on Audio � Video Stegnography

Abstract

Security is most important issue in digital communication. Data security means protective digital privacy measures that are applied to prevent unauthorized access to computers, huge databases and online data it is also protects data from corruption. Security is most important issue in digital communication. Cryptography and steganography are two popular methods available to provide security. Steganography focuses on hiding information in such a way that the message is undetectable for outsiders and only appears to the sender and intended recipient. It is useful tool that allows covert transmission of information over and over communications channel. Steganography is a technique which is used to hide the message and prevent the detection of hidden message. Various modern techniques of steganography are: a) Video Steganography b)Audio Steganography Audio Video steganography is a modern steganography of hiding information in a way that the unwanted people may not access the information.