I recently came across a website called www.grc.com. When you click on this link it will generate a ultra high secure WPA-PSK keys. Then you can cut and paste into your WIFI base stations and the computers that would like to join your network. I highly recommend this site if you have any Wireless/Network security concerns.
Also they have network port scanner which will scan how vulnerable your network is. I highly recommend you run the tool and close the holes in the firewall. Here is the link for this tool SheildsUp
This site also has software for recovering data from crashed hard drives. It is called SpinRite