WPA keys gone in 60 seconds
PrintTime to move to WPA 2
Posted in Wireless, 28th August 2009 10:11 GMT
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Networking nerds claim to have devised a way of breaking Wi-Fi Protected Access (WPA) encryption within 60 seconds.
The technique, developed by Toshihiro Ohigashi of Hiroshima University and Masakatu Morii of Kobe University, is based on the established Becks-Tews method, which involves making minor changes to packets encrypted with TKIP - Temporal Key Integrity Protocol, a WPA security mechamism - and then sending those packets back to the access point.
However, the Becks-Tews method is known to take anywhere between ten and 15 minutes to execute.
In a recently released paper, Ohigashi and Morii proposed a man-in-the-middle style of attack – also used by the Beck-Tews approach – in which a user’s communication is intercepted by an attacker.
This approach carries a high risk of detection, the pair admitted, so being able to shorten the attack time down to under one minute is a major advantage – to potential hackers, at least.
Ohigashi’s and Morii’s technique doesn’t work in WPA 2 – the AES-based successor to WPA.
The pair will formally unveil their technique at a conference in Hiroshima, Japan late next month. ®
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