Ny attack mot WPA

WPA är uppföljaren till det trådlösa WiFi-säkerhetsprotokollet WEP. Nu har de två forskarna Toshihiro Ohigashi på Hiroshima University samt Masakatu Morii på Kobe University hittat en ny metod som gör det möjligt att dekryptera trådlös WPA-trafik under 60 sekunder:

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.

Här hittas orginalartikeln: theregister.co.uk/2009/08/28/wpa_60sec

Jonas Lejon

Om Jonas Lejon

En av sveriges främsta cybersäkerhetsexperter med nästan 20 års erfarenhet inom området och en bakgrund från FRA och Försvarsmakten. Kontakta mig gärna på telefonnummer 010 1889848 eller [email protected] om Er organisation behöver hjälp med cybersäkerhet. LinkedIn Twitter

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