Wi-Fi; most of us are using it, I am as I type this.  But how do I know my neighbor isn't watching what I do?  Because some time ago I dumped Wired Equivalent Protection (WEP) for the more robust, and unbroken as of yet, Wi-Fi Protected Access (WPA2).  WEP has been broken for several years, with a number of tools out there to exploit it.  WPA2, as of now, has yet to be broken.  Which are you using?  WPA2 Personal, a pre-share key type authentication implementation is very similar to WEP on the setup and administration side, but that is where it ends.  WPA2, or 802.11i, makes use of the AES Block Cipher, which as stated, has yet to be broken.

Now the Wi-Fi Alliance is set to launch WPS, or the Wi-Fi Protected Setup, which will make it extremely easy and versatile to deploy.  Instead of explaining it though I will let you read about it.....