[IPython-dev] what is this "Untrusted text/latex output ignored." stuff?

Zoltán Vörös zvoros at gmail.com
Mon Feb 3 10:50:51 EST 2014

Hi all,

I don't want to be seen as impatient, or anything like that, but I feel 
that this signature thing is somehow broken, so I would like to follow 
up on Damián's and Matthias' comments.

No matter what I do, if I try to use an old notebook (old meaning 
created last Friday:) its content is not trusted. I have run

ipython trust mynotebook.ipynb

and I can see the signature at the top of the file. However, latex/svg 
are still not displayed. According to the PR that Damián referred to, 
only javascript and HTML items should be affected by this change, 
although, I understand that SVG might also be exploited for some 
injection attack.

All this is not a major issue for me at the moment, I would just like to 
make sure that the developers know about it.


On 03/02/14 13:15, Matthias Bussonnier wrote:
> Hi zoltan,
> we havent yet posted info on the ML about that and will do soon.
> In short, we sign the notebook when you save it, and if the signaure 
> don't mach we don't render potentially dangerous ouput.
> We will do the same in markdown soon if it contains script tag.
> WhiteListing latex might be an oversight.
> If you rerun the all notebook and save, the ouput should be tusted, a 
> least for you, more info soon.
> -- 
> Matthias
> On Mon, Feb 3, 2014 at 12:15 PM, Zoltán Vörös <zvoros at gmail.com 
> <mailto:zvoros at gmail.com>> wrote:
>     Hi all,
>     When a notebook contains sympy-generated latex code, the latex
>     content is not rendered on load, instead an "Untrusted text/latex
>     output ignored." messageis displayed. On the other hand, latex in
>     a markdown cell is trusted, and rendered properly. Is there a way
>     to instruct the notebook to "trust" the latex code even in the
>     output field of a code cell? Are there any security issues
>     involved here?
>     Cheers,
>     Zoltán
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