Visual Security Assessment of Selective Video Encryption

Abstract

Given the wide use of videos in various applications and across different devices, this raises the question of their security and confidentiality. In the last decade, many video encryption methods have been proposed in the literature. Accordingly, it becomes necessary to have a reliable assessment tool allowing evaluation of the efficiency of these video encryption methods, especially from the visual security point of view. Usually, the visual security is evaluated through the classical objective signal-based metrics. However, these metrics showed their limits as visual security metric, since they are not designed to deal with the security requirements, such as the determination of content intelligibility. Despite its obvious importance, very few visual security metrics have been proposed for the assessment of video encryption methods. This is mainly due to the lack of ground truth with subjective human scores for video encryption applications. In this paper, we present a new database for visual security assessment of selective video encryption. The database including unencrypted and encrypted video contents generated using different selective encryption schemes, as well as subjective scores, is publicly available to help designing new visual security metrics.1