[Tails-dev] TCP Sequence Numbers leak System Clock

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Author: Patrick Schleizer
Date:  
To: The Tails public development discussion list
Subject: [Tails-dev] TCP Sequence Numbers leak System Clock
Hi,

you might be interested in this:
https://twitter.com/ioerror/status/509159304323416064

Why could it be relevant?

Tor Browser (and other applications?) leak the system clock in default
settings [1]. At the same time, the system clock leaks to ISP level
observers through TCP sequence numbers. This opens up to "quite simple"
end-to-end correlation attacks, I think.

Cheers,
Patrick

[1] https://trac.torproject.org/projects/tor/ticket/3059