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I was reading about the recent FireSheep tool. People are saying that it is fine to sniff WPA/2 PSK networks because if you have the PSK, you can decrypt anyone's traffic.

I am wondering if there are any sniffers that actually decrypt and sniff in real time, that would actually allow that sort of attack?

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up vote 3 down vote accepted

Sure, probably the best known being Wireshark. It's free too!

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