1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 // Contains information collected by the RAPPOR (Randomized Aggregatable
6 // Privacy-Preserving Ordinal Responses) system.
8 // For a full description of the rappor metrics, see
9 // http://www.chromium.org/developers/design-documents/rappor
13 option optimize_for = LITE_RUNTIME;
18 message RapporReports {
19 // Which cohort these reports belong to. The RAPPOR participants are
20 // partioned into cohorts in different ways, to allow better statistics and
21 // increased coverage. In particular, the cohort will serve to choose the
22 // hash functions used for Bloom-filter-based reports. The cohort is
23 // generated randomly by the client and is currently in the range [0,32).
24 optional int32 cohort = 1;
26 // Each Report contains the values generated by the RAPPOR process for one
29 // The name of the metric, hashed (first 8 bytes of MD5 hash).
30 optional fixed64 name_hash = 1;
32 // The sequence of bits produced by random coin flips in
33 // RapporMetric::GetReport(). For a complete description of RAPPOR
34 // metrics, refer to the design document at:
35 // http://www.chromium.org/developers/design-documents/rappor
36 optional bytes bits = 2;
38 repeated Report report = 2;