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WEP: Dead Again, Part 1
by  Michael Ossmann
last updated December 14, 2004

Introduction
This article is the first of a two-part series that looks at the new 
generation of WEP cracking tools for WiFi networks, which offer 
dramatically faster speeds for penetration testers over the previous 
generation of tools. In many cases, a WEP key can be determined in 
seconds or minutes. Part one, below, compares the latest KoreK based 
tools that perform passive statistical analysis and brute-force cracking 
on a sample of collected WEP traffic. Next time, in part two, we'll look 
at active attack vectors, including a method to dramatically increase 
the rate of packet collection to make statistical attacks even more potent.

http://www.securityfocus.com/infocus/1814