---
id: 1909
title: "How safe browsing fails to protect user privacy"
source_domain: blog.trailofbits.com
source_url: "https://blog.trailofbits.com/2019/10/30/how-safe-browsing-fails-to-protect-user-privacy/"
published_at: "2019-10-30T11:00:57Z"
tags: ["browser-security", "cryptography", "privacy", "apple", "google", "surveillance", "safe-browsing", "k-anonymity", "tencent", "tracking"]
phying_url: "https://phying.com/item/1909"
lang: en
---

# How safe browsing fails to protect user privacy

## Summary

An analysis of Safe Browsing showing its k-anonymity is nearly meaningless: browsers reveal 32-bit URL hash prefixes to providers, as Apple did by routing Chinese users' checks to Tencent.

## Intelligence Metadata

- **Sources:** blog.trailofbits.com
- **Published:** 2019-10-30T11:00:57Z
- **Original:** https://blog.trailofbits.com/2019/10/30/how-safe-browsing-fails-to-protect-user-privacy/
- **Phying News:** https://phying.com/item/1909