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Thread: Why does it take a long time to tell me my password is wrong?

  1. #1
    Join Date
    May 2007
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    360

    Why does it take a long time to tell me my password is wrong?

    I've always wondered this and i was logging in and misspelled my name and it reminded me. Whenever i misstype a password or username it takes about 5 seconds for any linux distro to tell me it was wring, yet in windows and osx it tells me instantly. Is there some method to the madness that i dont grasp.

  2. #2
    Join Date
    Jul 2008
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    $HOME
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    Ubuntu 9.10 Karmic Koala

    Re: Why does it take a long time to tell me my password is wrong?

    Quote Originally Posted by NoSmokingBandit View Post
    I've always wondered this and i was logging in and misspelled my name and it reminded me. Whenever i misstype a password or username it takes about 5 seconds for any linux distro to tell me it was wring, yet in windows and osx it tells me instantly. Is there some method to the madness that i dont grasp.
    The madness is in letting the person try another password immediately. It means they can brute-force it by guessing lots of possibilities very quickly.

    The Linux way is much more secure. The guesser can't even be sure it's wrong until he waits a bit (it could just be starting the logging-in process).

    Does your bank's cash dispenser allow you key in several PINs in quick succession?
    If people were nicer, I'd answer more queries here!

  3. #3
    Join Date
    Oct 2006
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    Belgrade, Serbia
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    1,321
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    Ubuntu

    Re: Why does it take a long time to tell me my password is wrong?

    If you ask me, they should delay that exponentially or +1 second for each bad try
    However, you can log in automatically or set it to '0 seconds' if you want to: System > Administration > Login Window
    Last edited by forger; October 20th, 2008 at 03:15 AM.

  4. #4
    Join Date
    May 2007
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    360

    Re: Why does it take a long time to tell me my password is wrong?

    Quote Originally Posted by forger View Post
    If you ask me, they should delay that exponentially or +1 second for each bad try
    That sounds like a good idea. One typo and you only have to wait 1 second and you can log in right away. 2nd fail is 2 seconds, 3rd is 4, 8, 16, 32, 64...
    Not only is that more convenient but it would, in theory, be more secure against brute force attacks.

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