Re: [tor-dev] UX improvement proposal: Onion auto-redirects using Alt-Svc HTTP header

[Philipp Winter <phw@xxxxxxxxx>]

On Tue, Nov 14, 2017 at 02:51:55PM +0200, George Kadianakis wrote:
> Let me know what you think :)

Section 9.4 in the Alt-Svc draft talks about abusing the header for
tracking.  In particular, a malicious website could give each Tor user
a unique onion domain to track their activity.  That's particularly
problematic if the "persist" flag is used in the Alt-Svc header.

Granted, malicious websites can already do that to an extent by serving
unique onion domains on each page load, but we should still keep this
issue in mind.
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