tree d3d095e97bdaa9609c4c82ef32b84a866e90277b
parent 58f768e43b7c27ac6df30691bd6d2d494cc66551
author Laura Peskin <pesk@google.com> 1603756277 +0000
committer CQ Bot <commit-bot@chromium.org> 1603756277 +0000

[Cobalt 1.1 privacy] Bucket integers on client for per-device histogram reports with privacy

For reports without added privacy, contributions for the
Cobalt 1.1 per-device histogram report types consist of
raw integers which are bucketed on the server side.

However, for per-device histogram reports with privacy,
the encoding is much more straightforward and will likely
give us a better privacy/error tradeoff if we bucket
contributions on the client side and send an encoding of
the histogram bucket index. This CL implements client-side
bucketing and privacy encoding for per-device histogram
reports with privacy and updates the ReportDefinition
proto to note the change.

Change-Id: I817b33125d6960b20c341ccfc684cc7b2c62315d
Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt/+/442720
Commit-Queue: Laura Peskin <pesk@google.com>
Reviewed-by: Alexandre Zani <azani@google.com>