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On 19.04.13 04:09, Daniel Kahn Gillmor wrote:
> hi enigmail folks--
> 
> package/mimeEncrypt.js contains two hardcoded references to "enig2"
> that are used to create the MIME boundaries when using PGP/MIME.
> 
> In many circumstances it is not a problem to leak the information
> that the mail sender is using enigmail specifically, but there are
> some users and some use cases where the user does not want to
> reveal their choice of software.
> 
> See, for example, Tor's documentation about thunderbird and
> enigmail:
> 
> https://trac.torproject.org/projects/tor/raw-attachment/wiki/doc/TorifyHOWTO/EMail/Thunderbird/Thunderbird%2BTor.pdf
>
>  Is there a reason to use the "enig2" prefix in
> package/mimeEncrypt.js at all?  Would it be possible to simply
> remove it (and maybe extend the size of the string returned by
> createBoundary() ?  The attached patch implements the suggestion.
> 
> Alternately, if a fixed prefix is necessary for the boundary (i
> don't know why that would be), maybe we could move that fixed
> prefix into an enigmail preference, so that users could override it
> if they needed?

I can certainly do that. However, what would it change? I could still
identify a message created by Enigmail, and I could still tell you if
some other product would have faked a message to look like Enigmail.
Things like line wrapping of the Content-Type header, the text above
the first MIME part, the headers of the signature part etc. make a
message created by Enigmail identifiable.

- -Patrick
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