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Frequently Asked Questions
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Q. I'm trying to recover a 128-bit key. I've collected 800,000 packets, but WEPKR failed to recover the key. What should I do?
A. Recovering a WEP key is about probability. 800,000 packets are not sufficient in many cases. One of the most important factors is the number of unique initialization vectors (IVs) in the collected packets. 800,000 packets may contain 100% unique IVs or 50% unique IVs. This cannot be predicted. Also, even 800,000 unique IVs cannot guarantee success. So the best thing to do is to collect more packets by monitoring the WLAN for a longer period of time or by using the method described in the Traffic Generation chapter. Collect 1,600,000 packets and click Action => Start key recovery now to initiate a new key recovery session. If this doesn't work, collect 2 million packets.
Q. I'm trying to recover a key, one hour has passed, but the key has not been recovered yet.
A. First, make sure that you have a fast CPU. Recovering a WEP key on something like Pentium II-400 may take days. You must have at least Pentium 4. Second, the fewer packets you've collected, the slower the recovery process will be. If you have 800,000 packets for a 128-bit key and it's taking too long to recover it, collect another 800,000, in which case there is a very good chance that the key will be recovered within 15 minutes.
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