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TomRittervg's profile
Tom Ritter
Tom Ritter
Tom Ritter
@TomRittervg

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Tom Ritter

@TomRittervg

Crypto, Privacy, Pseudonymity & Anonymity, @ Mozilla

ritter.vg
Joined November 2008

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    1. Brian Smith‏ @BRIAN_____ Sep 6

      Brian Smith Retweeted Jake Archibald

      Awesome post. The evidence presented should be enough to motivate other browsers to at least start investigating doing the same. It would be great to see more evidence, confirming or refuting, how much sharing a cache between sites actually matters.https://twitter.com/jaffathecake/status/1037741010871353344 …

      Brian Smith added,

      Jake Archibald @jaffathecake
      In Safari, their HTTP cache is somewhat partitioned by requesting origin. It's a neat feature, but it makes public CDNs a little less useful. @AndyDavies has the details: https://andydavies.me/blog/2018/09/06/safari-caching-and-3rd-party-resources/ …
      2 replies 0 retweets 4 likes
    2. Tom Ritter‏ @TomRittervg Sep 6
      Replying to @BRIAN_____

      I'm not sure how valuable this is (privacy wise) unless you close all the holes (like resumption). In Firefox that's possible with containers or the (experimental) pref for first party isolation. In Tor Browser, it's on by default.

      1 reply 0 retweets 0 likes
    3. Ryan Sleevi‏ @sleevi_ Sep 6
      Replying to @TomRittervg @BRIAN_____

      And H/2. And socket pools.

      1 reply 0 retweets 0 likes
    4. Tom Ritter‏ @TomRittervg Sep 6
      Replying to @sleevi_ @BRIAN_____

      If you find a bypass in h2, you'll get a bounty from Tor :) Socket pools maybe not though; since they don't use that code.

      1 reply 0 retweets 0 likes
    5. Ryan Sleevi‏ @sleevi_ Sep 6
      Replying to @TomRittervg @BRIAN_____

      You're saying that H/2 coalescing is disabled, and distinct socket pools per keyed origin are used? Any pointers to the source?

      1 reply 0 retweets 0 likes
    6. Tom Ritter‏ @TomRittervg Sep 6
      Replying to @sleevi_ @BRIAN_____

      They should be! I'll go look tomorrow. :)

      1 reply 0 retweets 1 like
    7. Tom Ritter‏ @TomRittervg Sep 7
      Replying to @TomRittervg @sleevi_ @BRIAN_____

      H2 Coalescing is here: https://searchfox.org/mozilla-central/source/netwerk/protocol/http/Http2Session.cpp#2702 … which flows to https://searchfox.org/mozilla-central/source/netwerk/protocol/http/nsHttpConnectionMgr.cpp#762 …. OriginAttributes always contains a Container ID (if you don't have containers it's 0) and if you have FPI enabled, the first party origin. cc @mcmanusducksong

      1 reply 0 retweets 1 like
    8. Tom Ritter‏ @TomRittervg Sep 7
      Replying to @TomRittervg @sleevi_ and

      Socket Pools is governed the same way, in https://searchfox.org/mozilla-central/source/netwerk/protocol/http/nsHttpConnectionMgr.cpp#1893 … I did find some scary things about setting the socket reuse: https://searchfox.org/mozilla-central/search?q=symbol:F_%3CT_7d320e23007bb462%3E_4&redirect=false … but comments and discussions indicate this is used safely, only for ICE TCP or local net stuff.

      1 reply 0 retweets 1 like
      Tom Ritter‏ @TomRittervg Sep 7
      Replying to @TomRittervg @sleevi_ and

      So that part isn't very robust and might have some lurking issues but hopefully if present, they're limited. Bypasses welcome =)

      9:21 AM - 7 Sep 2018
      • 1 Like
      • Ryan Sleevi
      0 replies 0 retweets 1 like

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