To expand more on this great answer; the point of the deauth attack ans so forth are designed to generate a large number of IV's with which to work on. The ide

To expand more on this great answer; the point of the deauth attack ans so forth are designed to generate a large number of IV's with which to work on. The idea is that you can use weak IV's (as described above) to attack the subsequent bytes in the encryption key. The important thing to know is that the next byte cannot be definitively calculated - you can only calculate a possible value. The reason a lot of weak IV's is needed is so you can perform the same attack multiple times - at which point the correct byte value will appear much more often than any other value. (incidentally; the theory behind it is actually pretty simple but you do have to be up on your encryption terminology for it to make sense on first reading :) when I learned all this from scratch it took me ages to get my head round it)