Cedric Blancher wrote: > Le samedi 11 octobre 2008 à 11:03 +1100, Ivan . a écrit : > >> Global Secure Systems has said that a Russian's firm's use of the >> latest NVidia graphics cards to accelerate WiFi 'password recovery' >> times by up to an astonishing 10,000 per cent proves that WiFi's WPA >> and WPA2 encryption systems are no longer enough to protect wireless >> data. >> > > No kinding ?! 100 times what a CPU can do[1] ?! Whaooo. > > But what are they referring to saying "up to 100 times faster than by > using CPU only" ? We don't know. On, fast CPU, Aircrack cracking speed > can go up to around 650/700 psk/s. By 100, it means 65k/70k psk/s. Let's > round it to 100k psk/s. > > Now, do the maths. A PSK is a least 8 ASCII printable chars between > codes 32 and 126. I let you figure how much time you will need to cover > the minimum length (8 chars) key space. > > We covered the subject at BA-Con. We can reach 12k psk/s on a single > GTX280 alone[2]. That's only a factor 5 to 6 behind, without any > brilliant optimisation. > > I don't see any breakthrough here that could make WPA/WPA2 PSK > inefficient. Really. Need something like a real crypto attack, or real > computation power boost, like reaching 10M/s. > > > [1] http://www.elcomsoft.com/news/268.html > [2] http://sid.rstack.org/pres/0810_BACon_WPA2_en.pdf > I especially liked the fact that the tool in question is fairly priced.
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