Surveillance camera system balancing privacy protection and effective surveillance image use

Privacy protection has been attracting considerable attention in recent years. Several instances of surveillance video recordings of famous people in public stores being uploaded to the Internet have been reported. Such instances of privacy infringement have become increasingly concerning. A simple solution to this problem is to obscure the facial features of individuals being recorded in surveillance camera systems. However, in some cases where surveillance camera recordings are required, such as criminal investigations, the solution fails. Therefore, we propose a new surveillance camera system that balances the requirements of privacy protection and those of cases in which unobscured images are required. Further, we present the protocol of the proposed system and evaluate the security of the system against attacks.