The big thing in this apology is that they have deleted all the data. That was a good move and shows they listened to complaints. The app update is also smart. Hopefully they will implement a better friend finding system soon (maybe using the hashing ideas put forward in yesterdays HN thread).
We are sorry
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#42we are sorry you found out what we were doing and couldn't do much other than apologize about it.
/s
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#43Earlier quoted context omitted.
"So, as a clear signal of our commitment to your privacy, we’ve deleted the entire collection of user uploaded contact information from our servers." That sounds like exactly what you were hoping for.
Except for the "and then implement hashing from here on out." part. So, they haven't changed their implementation, they've just added the ability to opt out of the poor implementation.
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#44Regardless of whether they throw up a confirmation prompt, their privacy policy needs to clearly describe what information is scraped from your phone, how it's used, and how long it's retained.
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#45I have a question about how they store the contacts. Can't they encrypt each of the phone numbers before they get sent to the server? This way there's no breach of privacy and the friend suggestion feature still works for everyone.
That wouldn't add any real protection. Phone numbers is a very small set (100 million possible in the U.S. and Canada). A rainbow table of all possible combinations can be created in only a week or two.
If they are going to hash the data, they should salt it (and possibly use key strengthening a la bcrypt, etc).
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#46Re: We are sorry
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#48Dave's message is straightforward and sincere.
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#49My only qualm is that you can't revoke the permission from within the app. The opt-out should be as easy as the opt-in.