[tor-relays] About TBB downloadings

Lluís msl12 at sde12.jazztel.es
Thu Oct 16 13:07:24 UTC 2014

Yes, I meant Evince Document Viewer.

And about the built-in pdf reader, that vitually solves the issue.

If a suggestion might be accepted, a description, or a mention,
to the built-in reader in the TBB welcome page, might be useful
to newbies.

By the way, applies the same to the already downloaded pdf docs ?


On 10/16/2014 01:13 PM, Andrew Roffey wrote:
> Lluís wrote:
>> In the web page here:
>> https://www.torproject.org/download/download.html.en#warning
>> advises us not to "... open documents downloaded through Tor while 
>> online"
>> Many technical manuals and scientific papers are written in pdf 
>> format, and I usually read them.
> The reason for this is that offline applications can leak information
> outside of Tor. If the file downloaded contained an identifier unique to
> your Tor connection, and an application outside of that Tor connection
> leaked the identifier, then it would breach anonymity.
> For example, if you downloaded a HTML page as a file and an image
> contained a unique ID this could occur.
> To answer your question (or not really):
>> Is it safe to download them with TBB first and then open them with, 
>> say, "Document Viewer" ?
>> Where can I find more information about it ?
> I'm not sure whether Evince (I'm assuming this is what you're referring
> to) leaks information, e.g. downloading of external resources.
> By the way, Tails solves this problem by forcing all applications to go
> through Tor.

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