Question

what is WEP crack ?​

Answer 1

WEP was the encryption standard firstly available for wireless networks. It can be deployed in 64 and 128 bit strength. ... There are two methods forcracking WEP: the FMS attack and the chopping attack. The FMS attack – named after Fluhrer, Mantin, and Shamir – is based on a weakness of the RC4 encryption algorithm

Answer 2

hi

here is your answer

When Wi-Fi was first developed and popularized in the late '90s, security was not a major concern. Unlike wired connections, anyone could simply connect to a Wi-Fi access point (AP) and steal bandwidth, or worse—sniff the traffic.

The first attempt at securing these access points was termed Wired Equivalent Privacy, or simply WEP. This encryption method has been around for quite awhile and a number of weaknesses have been discovered. It has been largely replaced by WPA and WPA2.

Despite these known weaknesses, there are still a significant number of these legacy APs in use. I was recently (July 2013) working at a major U.S. Department of Defense contractor in Northern Virginia, and in that building, probably a quarter of the wireless APs were still using WEP!