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This paper demonstrates an active attack on the WEP protocol that is able to recover a 104-bit WEP key using less than 40.000 frames with a success probability of 50%. In order to succeed in 95% of all cases, 85.000 packets are needed. The IV of these packets can be randomly chosen. This is an improvement in the number of required frames by more than an order of magnitude over the best known key-recovery attacks for WEP. On a IEEE 802.11g network, the number of frames required can be obtained by re-injection in less than a minute. The required computational effort is approximately 2^20 RC4 key setups, which on current.
David G. Leeper, D. G. (2007) How Things Work: Wi-Fi—The Nimble Musician in Your Laptop, IEEE Computer, April 2007
CANADIAN CRIMINAL CODE: UNAUTHORIZED USE OF COMPUTER & MISCHIEF
Shap, D. (1995) Section 342.1 Criminal Code of Canada Unauthorized Use of a Computer System, The Legal Group for the Internet in Canada (LoGIC)

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