WPA-PSK Authentication process

[ruben.montes]

Hello,

I'm trying to understand how does WPA-PSK works (without any RADIUS server)... I understand that with WPA the keys are generated dynamically (PMK keys). Who generates them if there are no radius server? How often are they changed?

Thanks,

Ruben

[dixho]

If you use WPA-PSK, you statically configure the PMK. Based on the PMK, the WEP key incrememts one for each packet.

WPA-PSK does not change the PMK.

[dazza_johnson]

There is a very useful 10-page security analysis on WPA/WPA2 PSKs at the URL below. Not only does it demonstrate a WPA2 PSK being cracked using the OG150, it discusses the mechanics behind PSKs, the cracking process and more....

http://www.og150.com/tutorials.php
Go to: Wireless Pre-Shared Key Cracking (WPA, WPA2)

Darren