Private image region protection and reconstruction scheme for cloud-based video monitoring system using transform domain Wyner-Ziv video coding

Cloud-based video monitoring system has many advantages and interesting applications. However, it has a critical problem of invading privacy. For example, if cloud servers or transmission channels are attacked, their private data can be leaked to the attackers. If we use well-known encryption schemes such as AES or DES, the security lifetime will increase but it requires additional computational operations and algorithm modules. Therefore, we propose a novel video content protection scheme which can protect private event regions in a video sequence for cloud-based video monitoring services. When specific events have occurred or the high-resolution video needs to be stored, region adaptive transform domain Wyner-Ziv coding scheme is applied.