The rapid development of new technologies has brought important changes to our lives. In 5G/6G networks, the amount of multimedia data generated and transmitted has become unprecedentedly large. In this case, serious challenges have emerged in areas such as data security detection and transmission protection. Security needs to consider and accommodate the unique features of the new 5G platform and build security in as a standard. The techniques for detection of malfeasance and identification of lawbreakers in 5G/6G communication are required more and more on a daily basis. The research on multimedia communication security in 5G/6G networks is of great significance for fighting against illegal and criminal activity on the internet, maintaining social stability.

The main aim of this Special Issue is to solicit submissions to give a state-of-the-art overview of problems and solution guidelines emerging in 5G/6G. In particular, we seek submissions that address related problems, with a focus on current and future developments. A wide variety of topics will be addressed, such as secure multimedia communication in 5G/6G, privacy protection in 5G/6G networks, multimedia forensics for 5G/6G, etc. Papers on practical as well as on theoretical topics and problems are welcome. Original research and review articles are welcome.

Potential topics include but are not limited to the following:

• Security of multimedia information
• Multimedia secure communications in 5G/6G networks
• Media forensics for 5G/6G networks
• Cross-media security in 5G/6G networks
• Protocol security of communication in 5G/6G networks
• Live content security detection in 5G/6G
• Developing secure communication systems for multimedia
• Security risk management and evaluation of multimedia data in 5G/6G networks
• Availability and human factors of multimedia in 5G/6G networks
• Emerging multimedia security issues in 5G/6G networks
• Blockchain for multimedia security in 5G/6G