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justinschuh's profile
Justin Schuh 🤬
Justin Schuh 🤬
Justin Schuh  🤬
@justinschuh

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Justin Schuh  🤬

@justinschuh

Engineering Director on @GoogleChrome Trust & Safety. Co-wrote TAoSSA http://amzn.com/0321444426 . Past life in USMC/NSA/CIA. He, him, thou who shall not be named.

Silicon Valley
Joined September 2009

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    1. Justin Schuh  🤬‏ @justinschuh Jan 22
      • Report Tweet

      Justin Schuh  🤬 Retweeted Lukasz Olejnik

      This is a bigger problem than Safari's ITP introducing far more serious privacy vulnerabilities than the kinds of tracking that it's supposed to mitigate. The cross-site search and related side-channels it exposes are also abusable security vulnerabilities.https://twitter.com/lukOlejnik/status/1219873289230856198 …

      Justin Schuh  🤬 added,

      Lukasz Olejnik @lukOlejnik
      Apple/Safari Intelligent Tracking Prevention is a mechanism intended to improve privacy. It was found to have privacy vulnerabilities allowing sites to track the user (and fingerprint), and to stealing web browser history of a user. Incredible find. https://arxiv.org/pdf/2001.07421.pdf … pic.twitter.com/HR48ulUoHK
      Show this thread
      5 replies 61 retweets 117 likes
      Show this thread
      Justin Schuh  🤬‏ @justinschuh Jan 22
      • Report Tweet

      To add some context, Chrome's XSS Auditor was found to introduce exactly the same class of side-channel vulnerabilities. After several back and forths with the team that discovered the issue, we determined that it was inherent to the design and had to remove the code.

      8:32 AM - 22 Jan 2020
      • 17 Retweets
      • 61 Likes
      • Roland Kreuzer 🦥 Rocco Terlizzi ᕕ( ᐛ )ᕗ Nimrod Aviram Jip Kushal Dave Spawn Design Lazy 💫🍕 😷
      2 replies 17 retweets 61 likes
        1. Justin Schuh  🤬‏ @justinschuh Jan 22
          • Report Tweet

          I have no idea what Apple plans to do about this, because it's been a defining theme in their anti-tracking approach (and one of our major concerns). They attempt to mitigate tracking by adding state mechanisms, but adding state often introduces worse privacy/security issues.

          3 replies 8 retweets 30 likes
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        2. Ben Lee‏ @aircooledcafe Jan 22
          • Report Tweet
          Replying to @justinschuh

          So does this affect other browsers implementations too? Firefox, Brave and Edge all have some form of tracking prevention implemented now.

          1 reply 0 retweets 2 likes
        3. Simo Ahava‏Verified account @SimoAhava Jan 22
          • Report Tweet
          Replying to @aircooledcafe @justinschuh

          They’re based on shared block lists rather than device-specific classifications, thus you can’t use the information to fingerprint similarly.

          1 reply 0 retweets 8 likes
        4. 2 more replies

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