Hole in Tor causes TorMoil, update now

By Paul Ducklin, Sophos

November 6, 2017

Do you use Tor?

If you do, then you probably expect it to provide a basic level of online anonymity – notably, that it stops your own IP number showing up when you browse.

To explain.

Your IP number uniquely identifies your computer (or at least your network) so that it can send packets to the internet, and get replies back.

Every packet coming from your network – whether it’s a login attempt, an email you’re sending, or a website you’re browsing to – includes your IP number, to act as a sort of “return home” beacon.

Without this so-called source address, the other end of any internet conversation wouldn’t know what to do with its replies – you’d be able to speak to anyone, but to hear no one.

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