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---
breadcrumbs:
- - /Home
- Chromium
- - /Home/chromium-security
- Chromium Security
page_name: clean-software-alliance
title: Clean Software Alliance (CSA)
---
Chrome is participating in a pilot test of the [Clean Software
Alliance](http://www.cs-alliance.org/) (CSA), and provides a feature by which
CSA Installer Members can record information about what has been installed on
the system. These records consist of the following information:
<vendor_id> - unique identifier of the installation vendor.
<install_id> - unique installation ID (per vendor).
<publisher_id> - unique identifier of the publisher (or main product)
being installed.
<install_time_client> - installation start time as per the user’s
machine.
<install_time_server> - installation start time as per the server
time.
<advertisers_id> - a comma-delimited list of unique advertiser IDs
accepted by the user and installed in addition to the main product.
<hmac_sha256_validation> - hmacSHA256 hash of a string containing all
the entry fields using a private salt provided by every vendor. This field
is used to validate the entry data and to prevent abuse.
If Chrome detects a [security
incident](https://www.google.ca/chrome/browser/privacy/whitepaper.html#malware),
some of this data may be reported as part of its environmental data collection.
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