We see a lot of impressive hacking in the movies, not just taking over individual PCs but whole traffic systems and top security databases.

Waterloo Station formed the back drop for The Bourne Ultimatum, one of actions packed movie, in which Americans take over all of the CCTV cameras. But just how realistic is that scenario and worse, what about a hostile takeover?

According to Sarb Sembhi, IT systems analyst at ISACA, local authorities and the police use network TV because they can take advantage of the technology that allows them to view cameras on any system.

“Unfortunately not only does it enable them to view any camera on their system from anywhere, it also means that other people who shouldn’t have access to the system may end up having access to the system.

“Anyone can do this if they know what they’re doing,” he said. “It may not be friendly governments, it could be any government anywhere, it could be criminals, it could be terrorists, they can use the system for their own advantage.”

Paul Docherty of Portcullis Security is paid by governments and blue-chip companies to hack into their systems. He has been doing it for 20 years and believes hijacking Waterloo’s cameras would be a difficult feat

“The Waterloo scenario is a wired system, whereby they’re wired back to a central control station. You would need access to the control station in order to gain access to the data.

“In a wireless network the camera has to broadcast whatever it’s picking up across a wide area in order for it to be picked up by another system and then relayed to whoever is looking at the data. In those instances anyone can sit nearby and intercept the data.

“Potentially they could inject [data] packets in that so they could control the camera and point it in the direction they wanted it to go.”

The security is one of the most important thing in life. In the most expensive house in the world, the rich will install as many device as possible to maintain their security.