Difference WEP and WPA-PSK

WEP uses a encyption key and with WPA PSK we again define a pre-shared key , so how is WPA-PSK different from WEP?

and the documentation stresses on the dynamic key exchange for WPA, as we are defining a static PSK key for WPA so where is the 'dynamic' part?
and if the keys are dynamically generated in WPA than what does the PSK in WPA-PSK do?

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Comments

hexem

Temporal Key Integrity Protocol - Wikipedia, the free encyclopedia

That's the main difference, the way it handles encryption dynamically per packet, it's still using the RC4 that wep used.

mikem2te

zobo88 wrote: »

WEP uses a encyption key and with WPA PSK we again define a pre-shared key , so how is WPA-PSK different from WEP?

and the documentation stresses on the dynamic key exchange for WPA, as we are defining a static PSK key for WPA so where is the 'dynamic' part?
and if the keys are dynamically generated in WPA than what does the PSK in WPA-PSK do?

Here's a couple of links I found-

WPA-PSK: Step-by-Step - www.wi-fiplanet.com

WPA Wireless Security for Home Networks

TheShadow

The math formula for WEP is too simple and easly cracked with common tools in a few minutes, it has weak packet headers. WPA-PSK is a better algorithm called Temporal Key Integrity Protocol (TKIP). Later a hole was found and the Wi-FI group upgraded it to WPA2 which uses AES. So in a nutshell the differences are all about the strength of encryption.