A Review on Data hiding using Steganography and Cryptography

Abstract

Nowadays we are sending lot of data through internet. The data can be image file, video file, text file and audio file. Some of the data which is transferred through internet might be confidential or may not be confidential data. However everyone expects their data should be secured and it should not be hacked by others. There are lots of techniques to defend from unauthorized users. One of the techniques to protect the data from unlicensed user is cryptography. In cryptography, the data will be converted to encrypted data in the sender side. Encryption means converting original message to scribbled message, which is not in the readable format. The encrypted data will be sending through communication channel. If any unauthorized person access the data, the original data will not be visible. Only the receiver can decrypt the data. Steganography is another technique, in which the original data will be embedded into Cover file. The cover file can be text file or video file or image file. If any unauthorized person, try to access the message, the original data will not be visible instead cover file will be visible. Various steganography and cryptographic technique is presented in this literature review. Among that few are steganography based and few used both steganography and cryptography. The methodology in which both steganography and cryptography gives best performance