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 sys104
   
Location: Austria
Gender: Male
 |  | Info on visual surveillance systems
< on 5/8/2004 10:05 PM >
|  | | | Hi all,
beside university, I work as a security in large industrial buildings. Trough my work I was able to learn a bit about things that could be interesting for the UE community. So here it comes...
Risk assessment
First think about the complex you are going to explore. Surveillance cameras can be a laugh or a threat, depending on the building you are in. It is also important to know who is or could watch the camera output. This could be a security in the building or it could be remote. In lower risk fields its is also possible, that the guard is reading a book or so instead of waching the camera monitor at all.
If you know or encounter cameras you can`t get past and which are monitored by guards all the time there are still some chances. If the surroundings give you the chance, it is time for some social engineering. Have someone walk up the security guard desk (not in ninja clothes, at a reguar time with an usual outfit - dont give them a reason to remember you) and play a lost car driver with a map in the hand and ask for the direction of something (like the next bigger city) or so. If the guard is not an assface, he will give you some hints. Meanwhile, look if you can find the monitors of the cameras or other surveillance system controls. Is the picture good? Changes the picture to the next camera or are there multiple monitors? Decent systems are displayed by computers screens and not by some small monitor. Is the monitor even in a place where the security guard looks at it all the time? This sentence may look dumb to some people...but when you have to watch 20 security cameras all night, you get bored. Someone could have done some mass murdering in front of cameras I was supposed to watch, because a normal person with an average IQ cant watch the same picture for hours. Also keep in mind that the usual guard is a bit more retarded than the general person.
You can find even more info: how many guards are there? Is the guard busy with other things, like answering phone calls? Or watching porn? :o) Surveillance systems are only as good as the people using it.
If there is no security guard, there is a chance, that the cameras are remote operated. One system I operated is pretty smart: the cameras are controlled by a hybrid of a video recorder and a computer. The operator can choose the mode: the video stream can be stored and also automatically deleted after 24 hours as an example. If there is a movement in the surveilled area(like a person going trough), this can trigger different actions, like an email is sent to a specific adress with still images of the motion. Also web streams are possible.
Most of the time the camera is not watched at all, only if there was an incident, tapes or recordings are checked.
For technical info visit
http://videolab.gl.farmingdale.edu/comp1/vidcomp1.htm
or do a web search.
If there is interest, I can also give some infos about social engineering guards, access systems or fire reporting systems.
Please keep in mind that my experineces are gathered in Austria, you have to judge yourself how useful these hints can be in your environment.
sys104
[last edit 5/9/2004 12:22 AM by sys104 - edited 1 times]
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Duke
 
Noble Donor
Location: Awww-shitby, Ontario
Gender: Male
Move it or lose it
| | Re: Info on visual surveillance systems
<Reply # 1 on 5/8/2004 10:15 PM >
| | | | I know some people who work security and your assessment's pretty accurate even here in Canada. A friend of mine has actually done security at the Whitby Psych, knows which days to go and which not to, can be very handy.
[last edit 5/8/2004 10:15 PM by Duke - edited 1 times]
Contrary to popular belief, death isn't just for dead people. I know I was surprised too! It can happen to anybody! Horses, fiddler crabs, even a potato can die! - Tick
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scourge
Location: United States
Gender: Male
strive
| | Re: Info on visual surveillance systems
<Reply # 2 on 5/9/2004 10:51 PM >
| | | | My granddad, in one of the many jobs he has had over the years, watched a bank of these monitors at one point. He said that he rarely actually watched. Instead, he had a little alarm box to which were connected 10 or so little photocells on wires. He would tape one of the photocells to a spot on the monitor where someone would be most likely to appear - for example, if the camera watched a door, he'd tape one of the sensors over the image of the door. He did this to spots on all the monitors he had to watch. He then pushed a button on the box to 'set' it, and then he went about doing some other work (paperwork you idiots, not looking at porn, this was in the days before Al Gore invented the internet.) If the image on one of the monitors changed in the spot he had placed a photocell, for example because of the door opening, a little beeper in the box would go off, and he would look up and scan the monitors, see if there was any trouble.
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