When we think about wireless security, the very first step of an aggressor is to find a signal. Then, it might be possible to launch different classes of attacks such as man in the middle, recording, cyphering attacks, denial of service, etc. To improve the security of such an architecture, it might be a good idea to limit access-point coverage to radiate out towards windows, but not beyond : but sometimes it might not stop attackers inside the company, and wireless devices become smaller and smaller (!). Most of the time, whitehats also try to harden wireless clients and AP, but recent attacks destroyed things like WEP, etc.