Questions tagged [have-i-been-pwned]

Website allowing internet users to check whether their credentials have been compromised in the past.

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16 votes
4 answers

Should one reject login attempts when the correct password is newly added to a password deny list?

Best practices say that when users choose a password (at signup or when changing an existing password), the application should reject that password if it appears on a list of passwords known to be ...
1 vote
1 answer

Databases for compromised passwords that browsers use

I am looking into databases of compromised passwords in order to ensure that passwords on a system I am responsible for are not already compromised. To have complete peace of mind, I prefer to get ...
  • 343
-1 votes
1 answer

What can an attacker do if they find positive results for `haveibeenpwned`?

I know maltego has a haveibeenpwned module/transform. Assuming an attacker ran a bunch of emails through that module and got a few positive hits for haveibeenpwned, what can be done with those results?...
1 vote
2 answers

Is it a good idea to check if the password provided at registration is leaked on any lists? And then, prevent the user from using it?

A while ago, I was tipped off that it's a good idea to check if the password provided at registration is contained in any list of leaked passwords. I'm not in the information security field, but I ...
  • 43
1 vote
1 answer

How to explain "the k-anonymity model used by HaveIBeenPwned for pwned passwords doesn't expose your passwords" to a layman?

People are naturally skeptical when they hear about the HaveIBeenPwned pwned passwords search, because who would in their right mind enter their password into a random website? And sure, HIBP uses k-...
  • 7,343
3 votes
2 answers

Is this (explained in body) a possible attack vector when using haveibeenpwned API?

I'm currently working on understanding and contemplating to implement password strength validation for sign ups in my app, to include checking haveibeenpwned if entered password is compromised ...
  • 133
2 votes
2 answers

Why don't services like Have I Been Pwned send email if you haven't signed up?

When a database is breached and my password and email have been leaked I can go onto have I been pwned? and I can see that my password has been leaked. But why wouldn't the service send out an email ...
  • 121
0 votes
1 answer

Why would I 'have been pwned' on a website that I never had an account on? [duplicate]

I was recently sent a notification by that one of my email addresses has been found in a breach, in particular in a breach of I am positive I never ...
2 votes
1 answer

Is super paranoid use of HaveIBeenPawned password API going to help?

They way I understand HaveIBeenPawned password API is that it's a safe system because the site "can't do much with my partial hash even if they wanted to". But is that really true? Is the ...
  • 1,142
62 votes
6 answers

Is there a reason why I should not use the HaveIBeenPwned API to warn users about exposed passwords?

There's lots of talk about the HaveIBeenPwned password checker which can securely tell users if their password appears in one of their known data dumps of passwords. This tool has a publically ...
33 votes
3 answers

Sextortion with actual password not found in leaks

I have received one of those typical sextortion scams ("drive-by exploit", filmed by webcam (mine has tape on it), pay bitcoin etc.). The thing is that an old password of mine is included (I don't ...
  • 349
52 votes
10 answers

Is using haveibeenpwned to validate password strength rational?

I have been hearing more and more that the haveibeenpwned password list is a good way to check if a password is strong enough to use or not. I am confused by this. My understanding is that the ...
  • 925
0 votes
1 answer

Have I Been Pwned Breached Email List by Domain Names

HIBP is a great service that I've been using for a long time. I had a question surrounding Domain Search feature on HIBP. I believe there has to be some form of verification from our end in order to ...
2 votes
2 answers

Is haveibeenpwned (HIBP) free and reliable? [closed]

I have just started to explore HIBP to check whether we can use HIBP in our public facing interfaces. AS per my read I have 3 options to check out. Download the password dictionary and implement my ...
  • 121
35 votes
6 answers

How do I reset passwords on multiple websites easily?

One of my old email addresses was involved in the recent Whitepages breach disclosure (source: Have I Been Pwned). I don't remember on which websites I used that email address for registration, but I ...
  • 593
1 vote
0 answers

Are there any reliable and updated sources or feeds for password dumps? [closed]

I am looking for any reliable, up-to-date sources (which may be RSS feeds, websites, or anything else OSINT-based) which contain password dumps and their relative links. I am looking particularly for ...
2 votes
1 answer

How did my exact name + birthday end up in PwnedPassword lists? [closed]

I find my exact name + birthday in the form of FirstnameMiddlenameSurnameDayMonthYear, e.g. JamesWilliamMiller31052000 in the PwnedPasswords List. But I have a very uncommon Surname (<100 people) ...
  • 121
76 votes
5 answers

How can I be pwned if I'm not registered on the compromised site?

I recently was emailed from (which I am signed up on) about the ShareThis website/tool (not signed up on). I have no memory of signing up for that service. When I go to recover ...
0 votes
1 answer

Search list of emails [HaveIBeenPwned] [closed]

I want to search a list of emails, about 150 roughly on the website. Obviously, I do not want to search each address individually, is there a way to upload a list, or ...
  • 201
1 vote
1 answer

Email pwned versus password not pwned

A while ago my email had been pwned, I changed the password. Now since the January's massive breach I checked again and my email is found to be pwned, however the password I had then change to, isn't ...
67 votes
10 answers

Why check your email in haveibeenpwned rather than regularly changing your password regardless of any leaks?

There's a lot of news right now about haveibeenpwned but I don't understand why people need a service like that in first place. If you're a security conscious user, you'd change your passwords ...
  • 1,052
8 votes
2 answers

Why is breach-detection site "Have I Been Pwned" considered safe?

Whether it be due to technology the site is using, or any manual behind-the-scenes work with the data, why does this breach detection site seem to be unquestioningly safe? Wouldn't the data of you, ...
107 votes
7 answers

Is it safe to give my email address to a service like haveibeenpwned in light of the publication of "Collection #1"?

There is a new big case of stolen login/password data in the news. At the same time, I am reading that there are services that let you check if your own login data is affected, e.g. Have I Been Pwned. ...
  • 931
1 vote
1 answer

Search on email domains using the Have I Been Pwned API?

Using the HIBP API, is it possible to search for email domains? I know that HIBP has around 5 billion email records. All I want is a count of or records. I know that I can check ...
  • 11
41 votes
3 answers

Is it safe to check password against the HIBP Pwned Passwords API during account registration?

User registers account on a web app. Passwords are salted and hashed. But is it safe to check the password against the HIBP Pwned Passwords API, before salting and hashing it? Of course the app uses ...
  • 533
159 votes
8 answers

Is "Have I Been Pwned's" Pwned Passwords List really that useful?

My understanding of Have I Been Pwned is that it checks your password to see if someone else in the world has used it. This really doesn't seem that useful to me. It seems equivalent to asking if ...
  • 2,626