Original sentence: In 2006, Bittau, Handley and Lackey showed that the 802.11 protocol itself can be used against WEP to enable earlier attacks that were previously thought impractical.In 2007, Erik Tews, Andrei Pychkine and Ralf-Philipp Weinmann were able to extend Klein's 2005 attack and optimize it for usage against WEP.In 2008, Payment Card Industry (PCI) Security Standards Council’s latest update of the Data Security Standard (DSS), prohibits the use of the WEP as part of any credit-card processing after 30-June-2010, and prohibit any new system from being installed that uses WEP after 31-March-2009.Klein showed that there are more correlations between the RC4 keystream and the key than the ones found by Fluhrer, Mantin, and Shamir which can additionally be used to break WEP in WEP like usage modes.The same attack can be used for 40 bit keys with an even higher success probability.With the new attack it is possible to recover a 104 bit WEP key with probability 50% using just 40,000 captured packets
Edited sentence: In 2006, Bittau, Handley, and Lackey showed that the 802.11 protocol itself can be used against WEP to enable earlier attacks that were previously thought impractical.In 2007, Erik Tews, Andrei Pychkine, and Ralf-Philipp Weinmann were able to extend Klein's 2005 attack and optimize it for usage against WEP.In 2008, Payment Card Industry (PCI) Security Standards Council’s latest update of the Data Security Standard (DSS), prohibits the use of the WEP as part of any credit-card processing after 30 June 2010, and prohibit any new system from being installed that uses WEP after 31 March 2009.Klein showed that there are more correlations between the RC4 keystream and the key than the ones found by Fluhrer, Mantin, and Shamir which can additionally be used to break WEP in WEP-like usage modes.The same attack can be used for 40-bit keys with an even higher success probability.With the new attack it is possible to recover a 104-bit WEP key with probability 50% using only 40,000 captured packets