#20214: Ultrasound Cross Device Tracking techniques could be used to launch
deanonymization attacks against some users
 Reporter:  VasiliosMavroudis         |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:

Comment (by VasiliosMavroudis):

 Replying to [comment:7 bugzilla]:

 > Replying to [comment:6 VasiliosMavroudis]:
 > > You seem to imply that it's not possible to use ultrasounds to perform
 this attack. However, there are already a few companies using this
 technology, e.g., SilverPush, Lisnr.
 > >
 > Impossible on non ultrasound-capable hardware/software.

 That is correct. Unfortunately, most commodity devices such as
 smartphones, desktop/laptop speakers, and TVs are all ultrasound-capable,
 making this attack relevant.

Ticket URL: <https://troodi.torproject.org/projects/tor/ticket/20214#comment:8>
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