How to protect your wireless signal

I am a computer professional and I have several machines with WiFi and other means of communication between them and they outside world...
I have done everything from Locking Down my routers, authentication routines for getting on my network, proxy access to the network and the web...

These make it more difficult for a hacker, and hackers, like most criminals, are LAZY. THey will look for the unprotected wireless access points, or the ones that their little cracking tools work on. This is the only thing that protects my network...I have made it a little more work than they are willing to put into it.

Here are some steps (short of the next suggestion) that you can do to protect your wireless network:

#1 - TURN OFF BroadCast SSID in your wireless router
#2 - Use WPA2 (Enterprise) Authentication WITH a Certificate and Passphrase
#3 - Lock the Router down to specific MAC Addresses of the hardware that will be accessing your network
#4 - Use a Proxy that has some kind of Authentication
#5 - Use STRONG passwords

However, there is an easy way to lock-down a wireless network, and make it "hacker proof", its called a Faraday Cage.

Essentially, it is a fine wire mesh that is grounded. It traps wireless signals and prevents them from going in or out of the Faraday Cage. So if you have wireless access inside your house, or a wireless phone, they will work just fine INSIDE, but not beyond your boundary (marked by the Faraday Cage).

One drawback, your cellphone... it will work outside your house, but not inside your house (inside the Faraday Cage.

You can read more at Wikipedia

Another option, which I just read about, is to use Aluminium Oxide Paint,
Anti-wi-fi paint offers security