Hacking CCTV by changing time

“Now” is the future of the past; it is also the past of the future. The creation of time is only in our mind and in any system. As most computer systems rely on only one timeline to sequence the log and video, this paper explores the possibility of altering the recording function in a typical network video recorder through a Network Time Protocol (NTP) attack. The attack consists of an NTP redirection router and a local time server. If an attacker changes the recording time as the crime occurs, can the law enforcement notice the crime? This paper focuses on this weak point in the CCTV system. Video Summary: https://youtu.be/xzT9ELlA6RA