Audio Security Based on LSB Steganography and 4-D Lü System

Due to the huge progress made in communication and information technology, high-level security is required. Hence, with the many techniques emerged; therefore the main task is how to secure the information from hackers or to be manipulated. In this work, a security audio system based on cryptography and steganography techniques is proposed. The advantages of combining these techniques in a single system are to reduce the risks of editing the cipher information and to eliminate the risks of detecting the hidden information. In our system, 4-D Lu chaotic system is used to cipher the audio (i.e., secret message), to be hidden in the image (gray or color). Eventually, the Least Significant Bits method (LSB) is adopted for hiding the cipher information. Moreover, the use of 4-D chaotic system provides an efficient security key, which makes it more difficult to extract the original information by attackers. The analysis utilized a peak signal to noise ratio (PSNR) and mean square error (MSE). The results demonstrate that both of the secret audio and cover image are maintained in the receiver side.