WPA-PSK is vulnerable to offline attack.
   WPA-TKIP has been cracked.

TO AVOID THESE PROBLEMS:

1. USE WPA-AES or WPA2 instead of WPA-TKIP (or WEP)

2. USE A PASSPHRASE WITH MORE THAN 20 CHARACTERS.  Examples:
      BAD: "vintage wine"
      GOOD: "floor hiking dirt ocean"
         (pick your own words, even longer is better)
   FOR HIGH SECURITY, USE MORE THAN 32 CHARACTERS.

BACKGROUND:

   Weakness in Passphrase Choice in WPA Interface
   <http://wifinetnews.com/archives/002452.html>

   Practical attacks against WEP and WPA
   <http://dl.aircrack-ng.org/breakingwepandwpa.pdf>

   A Practical Message Falsi cation Attack on WPA
   <http://jwis2009.nsysu.edu.tw/location/paper/A%20Practical%20Message%2...>

   New attack cracks common Wi-Fi encryption in a minute
   <http://www.networkworld.com/news/2009/082709-new-attack-cracks-common...>

   Passphrase Flaw Exposed in WPA Wireless Security
   <http://www.technewsworld.com/story/32070.html>

   Cracking Wi-Fi Protected Access (WPA)
   <http://www.ciscopress.com/articles/article.asp?p=369221>
   <http://www.ciscopress.com/articles/article.asp?p=370636&rl=1>

   Cracking WEP and WPA Wireless Networks
   <http://docs.lucidinteractive.ca/index.php/Cracking_WEP_and_WPA_Wirele...>