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Comment by dylan604 | Hacker News Reader

you're not doing yourself any favors with the privacy minded folks that think people analyzing the data they did not provide to you directly for that purpose is something to be removed like cancer. but hey, at least you're honest about the granularity of the unintended data you can discern from the data you've purchased about everyday people.

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I wasn't quite clear - we don't have access to identifying information in the data (ie. we could measure Venmo but not that John Doe paid $X to Jane Doe at phone number XXX-XXXX)

I look at my statements, and each transaction from an app adds enough information to the memo line that I can ID the other user. I’m assuming the data you’ve purchased is “anonymized”, so I don’t know what that line item looks to you. But you still have time stamps and app names. Are you telling me you honestly could not deanonymize. Or are you telling me that you’re just not at this time?

If you have individual transactions with unique identifiers, that's basically the same thing.

You could probably demo this with a PoC asking the user to provide a sample of their transactions, and then use that to deanonymize the rest of them.

> analyzing the data they did not provide to you directly for that purpose is something to be removed like cancer

For the record, cancer is an appropriate metaphor to describe the data broker industry

Talking to adtech about their products vs criticizing their products is the most illuminating thing a privacy-minded person could do.

The nonsense “we care about privacy” wrappers go away and they start talking product-speak about the details. I don’t think privacy regulations change until adtech product leads get comfortable enough talking publicly about their deadpan views on what they can find out about users.

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