How does Gmail know my local time zone (therefore ignoring the time zone of the Tor exit node) and what else can it see?

Jan Weiher jan at buksy.de
Tue Sep 7 12:19:56 UTC 2010


> If Gmail can get the time zone via JavaScript (when the client is using
> Tor) then why can it not get the "real" IP also via JavaScript (when the
> client is using Tor)?  I don't think it can get the real IP since I have
> used various tests including http://www.decloak.net/ and Tor with
> JavaScript does not reveal the real IP.  But why not?

Because there are JavaScript functions to get the current time and
timezone and there are (afaik) no such functions to get some of your
network settings....

greetings,
Jan
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