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Have I Been Facebooked?

haveibeenfacebooked.com

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Re: Have I Been Facebooked?

#201

Earlier quoted context omitted.

If you read the bottom of the post, the complete phone number database has not loaded into HIBP yet. The results will likely change once it's done.

To be clear: I was listed on HIBP but not on this tool

Same here, my phone shows in HIBP but not in this tool

Re: Have I Been Facebooked?

#202
I am annoyed. I haven't updated my Facebook in years so most of the data is out of date and I use a separate phone line for personal correspondence, but I do still have a Facebook account for the occasional friend/family that uses messenger. This might be the final nail in the coffin for me and get me to delete my account.

Maybe I can finally get my last couple of friends to switch to Signal.

Re: Have I Been Facebooked?

#203
post #124

I deleted my (outdated) phone number from facebook years ago and it's still part of the leak, with my name and gender in it. I did not replace the phone number with another phone number. Really says something about what delete means for fb.

Yep, my guess is they just pop in a flag that says "not current" or "former" or something. Think about what someone could do with this data though. They can unfreeze your credit report. Apply for a loan or credit card or mortgage. All they need is your name, DOB, SSN (or just last 4), and the last 3 addresses you resided at.

Re: Have I Been Facebooked?

#204
From what I can see, this site sends your whole number to the backend to search for a number in the dump[0], while haveibeenpwned.com will hash the input, send only a prefix to the server and receive a list of hashes with the same prefix. If your hash is in the list, you've been pwned, but you can check without leaking your data to HIBP.

Edit: I just checked, seems like the form on the frontpage of HIBP also submits your complete email/phone number. Pretty sure I read about how you don't have to submit your personal data to validate against HIBP, not to long ago...

[0]: https://github.com/Fumaz/haveibeenfacebooked-api/blob/master...

Re: Have I Been Facebooked?

#205
post #124

I deleted my (outdated) phone number from facebook years ago and it's still part of the leak, with my name and gender in it. I did not replace the phone number with another phone number. Really says something about what delete means for fb.

> Really says something about what delete means for fb. Since the storage of data is so cheap, any company will archive data, for future profit. Why did you believe any data will be deleted in the first place? Were you counting that government will take action if it finds out? Are there any case like this in the past. I find it surprising even programmers believe their data will be deleted by the company. Most people…

In EU there's GDPR and right to be forgotten. If I forbid company to store my data they're obligated by law to remove it from their servers.

Re: Have I Been Facebooked?

#206
post #160

Earlier quoted context omitted.

That only holds for numbers already part of the dump. If you submit an unknown phone number that is not contained in the leak, hashing it before sending it will increase data privacy.

So a rainbow table of just 2.9 billion numbers covers the USA phone set. So I think searching for a specific number clear or hashed are roughly similar exposures. Maybe the right way to search without disclosure is really to filter. Meaning instead of putting in your full 10 digits. You just put in 7/8 and it returns a list of the rest for you to see. Then you visually scan to find your number out of the returned 999…

I think HIBP implements it like this: you hash your email/phone number and send only a prefix of the hash to the server. The server responds with a list of hashes matching the prefix. Now you can check if your hash is in the list. If so, you have been pwned. This way the server never knows which email you are requesting since it only ever sees a part of the hash.

Re: Have I Been Facebooked?

#207

From what I can see, this site sends your whole number to the backend to search for a number in the dump[0], while haveibeenpwned.com will hash the input, send only a prefix to the server and receive a list of hashes with the same prefix. If your hash is in the list, you've been pwned, but you can check without leaking your data to HIBP. Edit: I just checked, seems like the form on the frontpage of HIBP also submits…

haveibeenpwned.com does not use the k-anonymity method that you've described when searching for phone numbers: https://www.troyhunt.com/the-facebook-phone-numbers-are-now-...

Re: Have I Been Facebooked?

#208

From what I can see, this site sends your whole number to the backend to search for a number in the dump[0], while haveibeenpwned.com will hash the input, send only a prefix to the server and receive a list of hashes with the same prefix. If your hash is in the list, you've been pwned, but you can check without leaking your data to HIBP. Edit: I just checked, seems like the form on the frontpage of HIBP also submits…

haveibeenpwned.com does not use the k-anonymity method that you've described when searching for phone numbers: https://www.troyhunt.com/the-facebook-phone-numbers-are-now-...

Yeah should have validated that claim first. Seems like the form on hibp.com always submits your input to the server...

Still, if I had to chose between hibf.com and hibp.com, I'd lean to hibp.com since Troy is a known name in the industry and has offered this service for a long time without any complaints.

Re: Have I Been Facebooked?

#209
post #120

Aren't telephone directories a thing anymore? At least in my country you can just search for a person online and see their phone number. Someone's phone number seems like the least sensitive PII.

In France you are asked if your phone number should be listed. I do not remember if this is opt-in or opt-out.

Re: Have I Been Facebooked?

#210

Earlier quoted context omitted.

> Really says something about what delete means for fb. Since the storage of data is so cheap, any company will archive data, for future profit. Why did you believe any data will be deleted in the first place? Were you counting that government will take action if it finds out? Are there any case like this in the past. I find it surprising even programmers believe their data will be deleted by the company. Most people…

In EU there's GDPR and right to be forgotten. If I forbid company to store my data they're obligated by law to remove it from their servers.

Not quite, only if the basis for processing is consent.
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