Interesting. I can see that RAPPOR seems to be deprecated in favor of something else called ukm (Url-keyed metrics) but not why this change is being made. Is there somewhere I can read more about it?
I am not aware of any public announcement or explanation. Which is... probably intentional, since Google is removing a headline privacy feature from Chrome.
Our team looked closely at the Google, Microsoft, and Apple local differential privacy implementations when building Rally. It helped that we have friends who worked on RAPPOR.
