An apartment is a special case. Unlike a home that you own, an apartment will have certain limits on what you can do for security.
Let me first mention that you should consider additional security even if your apartment is equipped with a security system provided by the apartment owners.
A typical apartment provided system will have a keypad device just inside the entry door. If you read your lease, you will likely see that the apartment management has a right to enter your apartment in an emergency even if you are not home. And this requirement is legitimate. For example, assume there is a gas leak detected and they need to enter each apartment to check it out for leaks and to relight any appliances which still have the old pilots.
The apartment management has keys to your apartment and the entry codes for just such emergencies. If they enter, you are unlikely to know an entry was made since the security system would have been disabled while they are there. Wouldn’t you like to know if anyone enters and what they are doing while they are there? That is where your own additional security measures come in. Don’t be lured into a false sense of security just because you have an apartment provided system.
Now what can you do? Well, external security cameras are obviously out. An apartment is not going to let you mount external cameras since some level of drilling and mounting system would be needed. But you can do plenty inside your apartment.
The first thing I would is to install the HomeSafe Wireless Security System. You can find it at http://securityturf.net/shop/index.php?main_page=product_info&cPath=1&products_id=102
This system can be set to dial your cell or office phone to alert you if anyone enters your apartment. You can then listen in to any sounds going on in the apartment.
The second thing I would is to install some surveillance cameras which could be accessed remotely via the Internet. You can find an example at http://securityturf.net/shop/index.php?main_page=product_info&cPath=3_12&products_id=292
You can access these cameras remotely, even from your cell phone so you can observe what is happening in your apartment. The example camera above is a pan and tilt camera which can be moved about the room to observe an entire area.
You could even set up hidden cameras with DVR recorders to record anyone who enters the apartment. A variety of these can be found at http://securityturf.net/shop/index.php?main_page=index&cPath=6.
Using various surveillance cameras and an alarm which calls you, any entry into your apartment can be checked to insure it is authorized. You can alert the police if necessary.
As you can see, there are quite a few options to insure your security even in an apartment. Please let us know if you have any questions on any of our suggestions.