Received: January 23, 2021 Revised: March 20, 2021. 15 International Journal of Intelligent Engineering and Systems, Vol.14, No.5, 2021 DOI: 10.22266/ijies2021.1031.02 Video Steganography Using Chaos Encryption Algorithm with High Efficiency Video Coding for Data Hiding Jaladi Vivek 1 * Baswaraj Gadgay 2 1 Department of Electronics & Communication Engineering, Lingaraj Appa Engineering College, Bidar, India 2 Department of PG Studies in Electronics & Communication, Visvesvaraya Technological University, Kalaburagi, India * Corresponding author’s Email: vivekjaladi@outlook.com Abstract: Steganography is also known as data hiding, is a method of ensuring the security and confidentiality of digital data by hiding sensitive data in digital media. In video steganography, compression is the most demanding research area in block based video encoders. With the improvement of video coding equipment, the High Efficiency Video Coding (HEVC) delivers better coding efficiency. However, a large proportion of video frames showed system complexity and required a larger Coding Unit (CU) during encoding. Also, as the larger number of video frames were encoded, the time consumption was increased. To overcome such an issue, this research introduced the chaos with enhanced mapping technique to reduce computational complexity and fast encoding. In this research study, the position of each pixel of the secret video frame is calculated by the ELSB technique, where the existing LSB techniques have not considered this secret video frame’s position which leads to high video distortion. In proposed chaos en cryption with mapping method, the input video frames are encrypted by using logistic and henon mapping that simultaneously maintains quality and efficiency of the model. The HEVC technique compresses the input video frames and the proposed ELSB performs two functions namely replacement of LSB and matching of LSB which effectively embeds the secret video frames into cover video frames. Finally, the secret video frames are retrieved by HEVC technique with chaos decryption which provides security to the model. The results proved that proposed compression technique achieved PSNR of 35.81dB with average execution time of 40 seconds, but the existing H.264 compression technique achieved PSNR of 32.72dB with average execution time of 45 seconds. Keywords: Coding unit, Digital data, Encryption algorithm, Enhanced least significant bit, Quality, Steganography. 1. Introduction The development of the Internet and the advancement in the field of information and communication have made information security essential [1]. Digital images are the most popular file format due to their high availability on the Internet. The important data in the form of text, images, audio or video can be encrypted and hidden in another format of text, image, audio or video [2]. The combination of steganography and cryptography technologies can be a prime solution to strengthen security and maintain the confidentiality of data [3], where the main purpose of cryptography and steganography methods is to protect data from unauthorized persons. The process of getting the secret message (extracting the message) can be done by applying the cryptography and then the steganography based on the methods used in the hiding phase, where the selected methods for data hiding-extraction and data encryption-decryption must be secure and efficient [4]. The main disadvantages of cryptographic methods are the ability of hackers to find text messages and try to decrypt them using automatic counters based on computational mathematics or research experiments. Therefore, cryptographic techniques still have gaps in security, e.g. based only the decryption keys [5]. To address these issues, researchers use steganography, in which the security achieved by concealing confidential data on cover