A pair of Japanese researchers have developed an improvement on an existing technique for attacking wireless LAN traffic that enables them to intercept and decrypt encrypted packets in about a minute. The attack builds on the work done earlier by another pair of researchers who found a way to break the WPA encryption protocol that is used on many WiFi routers. The new attack doesn t work against systems using WPA2, the latest iteration of the protocol, and while it has mostly held up well, it has outlived its intended lifespan.
Source: https://threatpost.com/new-wifi-attack-cracks-wpa-again-082609/72942/