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Say that someone asked how secure my password is, if I give them the https://howsecureismypassword.net/ results of it, (especially if I disable the named numbers mode,) can that person brute force with the website's algorithm and possibly find my password?

  • Eventually, maybe. But you do rotate your password, right? Why not change a character or two? – schroeder Jan 27 '16 at 16:20
  • do you mean the details? Like length, character combinations, etc.? – Stef Heylen Jan 27 '16 at 16:46
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    This website is utter idiocy. No, P@ssword is not significantly harder to guess than password. – Steve Dodier-Lazaro Jan 27 '16 at 17:03
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    Might be a good idea to run such a site and log all passwords and wait for users bragging how good there password is. Then just compare their claim against the logged passwords. – Steffen Ullrich Jan 27 '16 at 17:13
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    @ParthianShot obligatory xkcd – dave_thompson_085 Jan 28 '16 at 1:29
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By posting those results, you are limiting the pool of guesses the person has to use. However, this does not make brute forcing faster in a practical way, it simply limits the guesses the person will try. With a strong password, this brings diminishing returns -- excluding guesses without numbers or symbols doesn't help all too much.

However there is one exception: if the site reports you're using a "commonly used password" then it makes brute forcing extremely fast. And if you're using a password from that list, you deserve it!

  • -1. If you are using a commonly used password, you're already screwed. Posting the results in that case makes no difference. – forest Dec 13 '17 at 2:12
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There should be no risk. The password you enter on https://howsecureismypassword.net/ is in no way related to where you actually use it. (Or don't tell the one who knows where you use it that you used https://howsecureismypassword.net/ for this :)

Say you test your password that you use on amazon.com ... You can enter that fine on https://howsecureismypassword.net/. Als long as there is no relation to that fact that you're using it on amazon.

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    Ever heard of credential stuffing? Trying a couple passwords on many websites is a lot easier than trying millions of passwords on one website. – AndrolGenhald Jun 8 at 16:42

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