Audio Transmission Based on Hybrid Crypto-steganography Framework for Efficient Cyber Security in Wireless Communication System

Wireless systems enable people in last decades to communicate and access applications and information without wires, which provided better image, audio and video transmitting with progressive needing for information security research. In a digital world, Cryptography and steganography are both intended to protect information from unwanted hackers. Both are excellent suggestion which are applied within different multiple layers of data security. Steganography is the type of security which used to hide the user data into a cover medium while observing the least possible statistical detectability. Cryptography is a schedule in which the data is decoded into encrypted form and distributes them, so both are used to assure security and privacy. But each of them needs to satisfy added properties such as robustness, un-detectability and capacity etc.

The proposed approach depends on multi-audios, multi-encryption algorithms, and only one steganography algorithm, where users can access encrypted audios with an encryption key and decrypts them with a decryption key, while in steganography, secret messages are hidden in cover media with no change of audios structure. It is very beneficial for sending the information secretly from one point to another without letting anyone understand that the other or critical audio document has been sent.

In this paper, a novel hybrid audio crypto-steganography algorithm is based on the merging cryptography with steganography to have crypto-steganography algorithm which used to overcome each other’s drawbacks and work hard to resist attacks or stealers. Also the system may gain more security of crypto-steganography when it applied over many layers of audio data and many layers of encryption algorithms to be transmitted after that over Orthogonal Frequency Division Multiplexing (OFDM) system which is considered in this paper as a Worldwide Interoperability for Microwave Access (WIMAX) system based on Fast Fourier Transform OFDM (FFT-OFDM), Discrete Cosine Transform OFDM (DCT-OFDM), and Discrete Wavelet Transform OFDM (DWT-OFDM), which recorded perfect extraction of audio signals at the receiver side with good performance for hybrid crypto-steganography algorithm.