Define WEP cracking?

WEP cracking is a method used for a security breach in wireless networks.
There are two types of WEP cracking:

  1. Active cracking
  2. Passive cracking.

In order to crack WEP, we need first to capture the large number of packets that means we can capture a large number of IVs. Once we have done that, we will use a tool called aircrack-ng. This tool will be able to use statistical attacks to determine the key stream and the WEP key for the target network.
To crack the WEP key in most cases, 5 million encrypted packets must be captured to collect about 3000 weak initialisation vectors. (In some cases 1500 vectors will do, in some other cases more than 5000 are needed for success.)