University of Kashan Soft Computing Journal 2322-3707 9 2 2021 02 19 An adaptive steganography method for compressed videos with HEVC standard An adaptive steganography method for compressed videos with HEVC standard 72 83 111575 10.22052/scj.2021.242817.0 FA Zahra Bahrami-Asl Department of Computer Engineering, Qom Branch, Islamic Azad University, Qom, Iran Mohammadreza Ramezanpour Department of Computer Engineering, Mobarakeh Branch, Islamic Azad University, Mobarakeh, Isfahan, Iran. Reihaneh Khorsand Department of Computer Engineering, Dolatabad Branch, Islamic Azad University, Isfahan, Iran. Journal Article 2020 09 27 Among others, steganography of  video data is an important research topic in data encryption technologies, which is considered as an essential tool; this is because not only the security required for the transmission of hidden messages is becoming increasingly difficult, but also such security in video files has a high important. This research is based on the HEVC standard, which is the latest video compression standard to date. This paper presents a new method for steganography of compressed videos with the HEVC standard. In the proposed method, the motion vectors of the prediction blocks inside the frame are used as carriers of hidden information. A set of randomly selected coding block motion vectors is used and embedding of information is done by increasing or decreasing one unit of the motion vector component. The experimental results showed that after embedding the hidden information, the video quality decreased low but the average of the embedding capacity increased. Among others, steganography of  video data is an important research topic in data encryption technologies, which is considered as an essential tool; this is because not only the security required for the transmission of hidden messages is becoming increasingly difficult, but also such security in video files has a high important. This research is based on the HEVC standard, which is the latest video compression standard to date. This paper presents a new method for steganography of compressed videos with the HEVC standard. In the proposed method, the motion vectors of the prediction blocks inside the frame are used as carriers of hidden information. A set of randomly selected coding block motion vectors is used and embedding of information is done by increasing or decreasing one unit of the motion vector component. The experimental results showed that after embedding the hidden information, the video quality decreased low but the average of the embedding capacity increased. https://scj.kashanu.ac.ir/article_111575_8917315f008868ef1c32165e4c462ac5.pdf