IP video streams can be encrypted and are difficult to intercept. On the other hand, the network itself is subject to viruses and other types of attacks. Since each camera (and there could be 1000’s of them in a single system) and the devices which it communicates with are network appliances, they are all subject to attack from hackers from anywhere in the world.

Analog signals are less secure and can be intercepted and/or viewed by anyone with access to the cabling infrastructure. With the possible exception of the DVR, the entire video surveillance chain is immune to viruses
and other types of software attacks. In order to access, or interfere with, any part of the video system other than the
recording devices attached to the network, a hacker or intruder would have to physically access the specific de-
vice being tampered with.