TPK Archival

Chris Hills chaz at
Tue Mar 24 17:47:03 CET 2009

On 24/03/09 17:06, David Shaw wrote:
> Try something like this.
> To encode:
>    gpg --export-secret-key (thekey) | paperkey --output-type raw | dmtxwrite -e8 -f pdf>  my_pdf_file.pdf
> You can pass pdf, eps, svg, etc, to the -f option.  Use 'dmtxwrite -l'
> to get a list of all supported image formats.
> To decode:
>    dmtxread -N1 my_pdf_file.pdf | paperkey --pubring ~/.gnupg/pubring.gpg>  my_new_secret_key.gpg
> dmtxread and dmtxwrite are part of the very clever libdmtx package at
> I've actually been toying with building Data Matrix support directly
> into paperkey (using libdmtx), but it's not clear what the point is
> when dmtxread and dmtxwrite are so easy to use.
> David

Thanks David, that is exactly what I was looking for. For some reason 
after I compiled libdmtx 0.7 the PDF and SVG formats are not available, 
but I can manage with PNG.


Chris Hills

More information about the Gnupg-users mailing list