ntfs
You may want to check with your local locksmith, they may have systems for businesses. There are also systems that you can connect through you computer. These systems can be connected to you local police.
security distribution
GE and ADT are companies I know that will install the home security systems. You can visit your home improvement local store to ask if they do it also, remember to compare price.
There are two local companies who are directly located in Bridgeport. Electronic Security and Control and Chagnon Electrical Services Group. There are also two other companies not in Bridgeport but do service that area and they are Sonitrol Security Systems and Homeguard, Inc.
A local police force may be able to offer insight into the best security systems for your home or business. Neighbours and co-workers can also be a valuable source of information and insight, as can local businesses who have security systems.
You can find more info on security cameras by going to any local store around you area about security cameras. Or you can also go on Amazon.com to find out.
There are several home security system companies out there today. Some are Protect America, Vivint, Simplisafe and Life Shield. One can look in the local directory or phone book under the term home security for a list of local companies.
You don't mention what you mean by "local security". In general, this is not a question about an Operating System, but a security model. For example, a peer-to-peer network has little regard for security and does allow for local resource sharing. Peer-to-peer networks can be implemented in most operating systems; it is just a matter of configuration.
Private security systems provide the exact same services as local state/county systems, but charge all the government agencies for the service. They have their own jails/prisons, transport services and guards.
Smith Monitoring is the top brand of home alarm systems and are is the most well known, especially in Texas. It is Professionally installed, doesn't require a land line and service is available for a low monthly fee. Honeywell, DSC and Napco are the top brand names in Home Security Systems. These brands are installed by the pros because they are known for reliability and can be monitored by all security companies worldwide.
I suggest contacting my local police department first and foremost to make certain that such a camera is allowed. I would be concerned about privacy if this were placed in a public place. I would then contact a local security firm for installation of hidden cameras.
Go to the website that makes the type of security system you have and browse through the website to see if they have security cameras that are compatible with your alarm system. If they do not have security cameras, check a local technology store such as Best Buy, and ask if they have anything!