When Apple originally announced the use of differential privacy in iOS 10, it was not without a little controversy. Skeptics from all corners began wondering how private differential privacy could really be when used in a mass deployment in the way that iOS 10 was going to use it.
Apple clarified that the use of differential privacy to collect user data would be opt-in, meaning if a user didn’t want to give into the system they didn’t have to. What Apple never indicated was where this opt-in area would be and what would happen if you decided against it…
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