I noticed that a check on a good password takes ~.5 seconds. However, if you give a password that is incorrect, it takes ~3 seconds to inform the user as such. Why is this?

  • 1
    This is probably a safeguard to limit the rate at which passwords can be guessed. Hopefully an answer can be posted confirming (or debunking) this. (Then this comment can be removed as obsolete.) Commented Jul 13, 2012 at 19:30
  • This is indeed for security. @EliahKagan ,Your comment is good enough as an answer for this question. :)
    – drake01
    Commented Jul 13, 2012 at 19:38
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    Does this answer your question? Why is there a delay when entering a wrong password?
    – muru
    Commented Aug 8, 2023 at 9:46

1 Answer 1


Its for the security of the operating system. The arbitrary wait is to check brute-force attacks.

Duplicate Question: https://serverfault.com/questions/16232/ubuntu-linux-takes-longer-time-for-incorrect-passwords

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