Google buys your credit card purchase data. Did you give it that? Why do you think Google wants you to stay logged into Chrome?
Let’s be honest here and call a spade a spade.
The world is just realizing how ads based business models work and there’s no difference between Google and Facebook.
A more accurate explanation of the scare quote:
https://news.ycombinator.com/item?id=16698587
> IIRC, this was announced as part of a program that uses double-blinded crypto that allows google to perform matching against this data in aggregate (Set intersection knowledge), but not individually identity of what a given user purchased, at the same time preventing the merchants from learning the identities of individuals either.
> According to what they presented at a crypto conference, they went to great pains to avoid capturing personally identifiable transactions. The overall strategy is that Google Knows = Set A = (all ads shown for user X at Merchant Y) Merchant/Credit Card Proccessor Knows = Set B = (all $$$ paid by User X at Merchant Y), and that it is possible to cryptographically compute sum($$$ of A intersect B) without either side learning Set(User X).
> Now whether you believe in the security of the algorithm and whether there are side channel leaks or attacks is another issue.
> Edit: http://bristolcrypto.blogspot.com/2017/01/rwc-2017-secure-mp...
> About 10 minutes in https://www.youtube.com/watch?v=ee7oRsDnNNc
I never told Facebook to upload my cell-phone contacts to their servers, where-as with Google, I willingly store them using Google Contacts.
It's not so much the data they have, but how they obtain and use the data they have.