[tor-bugs] #18273 [Tor Browser]: CSS animations provide high resolution timer

Mon Feb 8 13:26:43 UTC 2016

#18273: CSS animations provide high resolution timer
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 Reporter:  cypherpunks                      |          Owner:  tbb-team
     Type:  defect                           |         Status:  new
 Priority:  Medium                           |      Milestone:
Component:  Tor Browser                      |        Version:
 Severity:  Major                            |     Resolution:
 Keywords:  tbb-fingerprinting-time-highres  |  Actual Points:
Parent ID:  #16110                           |         Points:
  Sponsor:                                   |
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Comment (by cypherpunks):

 Type some text into the input field.

 {{{
 <html><body>
 <p id="test_id">Test.</p>
 <input type="text" id="myInput" oninput="logTime()">

 <script>
 function logTime() {
   var time_el = document.getElementById("test_id");
   var color = getComputedStyle(time_el).getPropertyValue("color");
   document.getElementById("time").innerHTML += color + "<br>";
  }
 </script>

 <p id="time"></p>

 <style>
 p#test_id {
   animation-duration: 1s;
   animation-name: slidein;
   animation-iteration-count: infinite;
 }
 @keyframes slidein {
   from { color: black; }
   to { color: white; }
 }
 </style>
 </html></body>
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18273#comment:3>
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