International Journal of Engineering and Advanced Technology (IJEAT)
In secure data communication network security is important. Basically in cryptography encryption is used for data security. Still attacker can attract towards encrypted data due to different form of data. So this limitation could overcome by using steganography. Steganography is the technique of information hiding. In steganography different carriers can be used for information hiding like image, audio, video, network protocols. Network steganography is a new approach for data hiding. In network steganography network layer protocol of TCP/IP suite are used for data hiding.