How Wifis and wifi security work?

• HowStuffWorks: How WiFi Works
• 6 Steps to Secure Your Home Wireless Network
• SANS paper: How Things Work: WLAN Technologies and Security Mechanisms (PDF)
• Nice SecurityFocus article Coffee shop WiFi (2006)
• WarDrive.net
• Getting deep at SANS
• Breaking WEP Encryption
  • WEP Security Called Unreliable, has a paper reference.

And, 10 Tips for Wireless Home Network Security
I skipped the Wikipedia, but you can look it up from these references.

The podcast "Security Now" did a full show about wifi security, you can find the transcript here :

http://www.grc.com/sn/sn-170.htm (in pdf here)

It is very detailed :

Steve: No. No. And there again, AES is a cipher called "Rijndael." TKIP is a protocol. CCMP is the protocol which uses AES. I mean, so my point is...