Gone in 120 seconds: cracking Wi-Fi security

Tuesday, 15 May 2007, 3:26 PM EST

When WEP was compromised in 2001, the attack needed more than five million packets to succeed. During the summer of 2004, a hacker named KoreK published a new WEP attack (called chopper) that reduced by an order of magnitude the number of packets requested, letting people crack keys with hundreds of thousands of packets, instead of millions.

Last month, three researchers, Erik Tews, Andrei Pychkine and Ralf-Philipp Weinmann developed a faster attack (based on a cryptanalysis of RC4 by Andreas Klein), that works with ARP packets and just needs 85,000 packets to crack the key with a 95 per cent probablity. This means getting the key in less than two minutes.

At The Register.

[ Read more ]




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