[tor-bugs] #25985 [Obfuscation/Snowflake]: Snowflake rendezvous using AMP cache

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#25985: Snowflake rendezvous using AMP cache
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 Reporter:  twim                   |          Owner:  (none)
     Type:  project                |         Status:  needs_revision
 Priority:  Medium                 |      Milestone:
Component:  Obfuscation/Snowflake  |        Version:
 Severity:  Normal                 |     Resolution:
 Keywords:                         |  Actual Points:
Parent ID:                         |         Points:
 Reviewer:                         |        Sponsor:
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Comment (by dcf):

 Now Microsoft is providing an AMP cache and AMP viewer via Bing.

 https://amphtml.wordpress.com/2018/09/19/introducing-bing-amp-viewer-and-
 bing-amp-cache/

 Here's an AMP cache link and the corresponding AMP viewer link (unlike
 Google, this one doesn't redirect you when viewed with a non-mobile
 device):
   https://amp-space-com.bing-amp.com/c/s/amp.space.com/41904-london-band-
 rocks-with-nasa-shuttle-enterprise.html
   https://www.bing.com/amp/s/amp.space.com/41904-london-band-rocks-with-
 nasa-shuttle-enterprise.html

 For comparison, these are the corresponding Google links. Just change
 `bing-amp.com` to `cdn.ampproject.org` and `www.bing.com` to
 `www.google.com`.
   https://amp-space-com.cdn.ampproject.org/c/s/amp.space.com/41904-london-
 band-rocks-with-nasa-shuttle-enterprise.html
   https://www.google.com/amp/s/amp.space.com/41904-london-band-rocks-with-
 nasa-shuttle-enterprise.html

 Domain fronting works with www.bing.com as a front, but not with
 www.microsoft.com or ajax.aspnetcdn.com.
 {{{
 $ wget https://www.bing.com/c/s/amp.space.com/41904-london-band-rocks-
 with-nasa-shuttle-enterprise.html --header 'Host: amp-space-com.bing-
 amp.com'
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25985#comment:28>
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