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I know that preventing output on the console or in anyway makes the program run much faster. Displaying the output is a long process to complete.

But I wonder if using -q option in aircrack-ng, which basically skips the output, would make a significant difference? I'm doubtful because aircrack-ng doesn't display Master Key, Transient Key and EAPOL HMAC for all the keys in the dictionary.

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    What is the stopwatch telling you? – eckes May 10 '17 at 21:02
  • Seems like a very easy thing to test – schroeder May 11 '17 at 12:12
  • @eckes : I thought someone must have already tested it. – 7_R3X May 11 '17 at 15:14
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I tried aircrack-ng on a dictionary with 2,000,000 keys and none of these keys is the correct password. So aircrack-ng had to go through all of those 2,000,000 passwords. Handshake was WPA encrypted, aircrack version was "Aircrack-ng 1.2 rc4". I ran this test on a Core i5 4th Gen machine with 4 gigs DDR3 ram and here's the result:

Normal Mode (With Output)   : 1281.495 seconds
Quiet Mode (Without Output) : 1264.578 seconds

The time noted is not the system/CPU time of the process but instead it's wall clock time (i.e. all the elapsed time including time slices used by other processes).

So yes, preventing the output does make a difference but it's not as much as I expected. Maybe it's because aircrack-ng doesn't create output for all the keys tested.

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