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204 results found

  1. Question: Can a Subsequently Deleted EMail Address be accurately confirmed via HIBP, if Registered via EMail Link PRIOR TO Deletion ? Thank

    Question: Can a Subsequently Deleted EMail Address be accurately confirmed via HIBP, if the EMail Address was confirmed Registered (via EMail Link) PRIOR TO Deleting the E-Mail Address ? Thank You.

    1 vote
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    1 comment  ·  Admin →
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  2. Allow users to search for an email address by hash rather than sending the email to the API in cleartext.

    Under the suspicion that submitted email addresses are being harvested, a privacy conscious user could feel safer checking for the presence of their email in the database by submitting a hash of it rather than the email address itself. I, for instance, have two email addresses: one which everyone knows, and one which very few people know. I'm very curious about the latter, but there's no way I'd enter it into any web form.

    47 votes
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    3 comments  ·  Admin →
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    declined  ·  AdminTroy Hunt (CEO / Founder, Have I Been Pwned) responded

    I’m closing this out as “declined” for several reasons:

    1. Now with almost 5B records, there’s a very high chance I have the hash being searched already and if I have that, I know the plain text.
    2. It would lead to massive redundancy in the system, literally doubling the volume of data I store
    3. It would be very rarely used; the vast majority of requests come via the web app from consumers browsing to the site and yes, I could hash on the client, but then you have to trust HIBP is reliably doing that which bring me to the final point…
    4. …I would advise against sending an address to any service you don’t trust, regardless of the lengths I go to in ensuring searches aren’t recorded

    So in summary, a combination of high effort and low reward.

  3. Interpret all permutations of an email address (period seperations, +filters)

    Gmail will ignore periods in an email when it comes to rounding. So email@gmail.com and e.mail@gmail.com will both go to the same address. Someone might want to use the email because it lets them filter those messages from within Gmail.

    I tested it, and as of right now, haveibeenpwned sees them as seperate emails which may give users a false sense of security.

    Develop a way to find all permutations of an email based off of their filterless email address.

    3 votes
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    declined  ·  2 comments  ·  Admin →
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  4. Include credit cards as another search dimension

    As well as user accounts there seem to be a lot of credit cards being leaked. It would be interesting to add credit card numbers to the other search dimensions (username and email address).

    There are some security implications around uploading your credit card to hibp but hibp would not need to store it at all. One you had it hash it and also store the found numbers as a hash. It would then slide right into the existing partition/row key schema.

    If such a system could be implemented I would even consider it a service worth paying for. Perhaps…

    71 votes
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    8 comments  ·  Admin →
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