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 -- http://sid.rstack.org/ PGP KeyID: 157E98EE FingerPrint: FA62226DA9E72FA8AECAA240008B480E157E98EE >> Hi! I'm your friendly neighbourhood signature virus. >> Copy me to your signature file and help me spread! _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
