Multimedia Privacy Protection Based-on Blockchain: Survey

The use of blockchain technology is one of the latest technologies used to protect digital content. This paper provides a brief overview of Blockchain-based applications for protecting the privacy of audiovisual material within the time period (2015–2021), in which methods of using Blockchain technology alone or in combination with traditional content protection techniques (encryption, digital watermarks, fingerprints, etc.) are presented. Recently, researchers moved towards developing this technology by integrating it with different encryption techniques because the number of content protection systems based on Blockchain technology was few due to the many problems in it. For this reason, we note in this review that the number of research in recent years is much greater than in previous years. This paper discussed the technical challenges, advantages, and disadvantages of each method used in previous research, and outlined future research directions.