Paper backup

Dashamir Hoxha dashohoxha at
Mon Apr 25 16:38:46 CEST 2016

On Mon, Apr 25, 2016 at 4:01 PM, Robert J. Hansen <rjh at>

> > This PDF file can be printed and used as a paper backup. It can be
> restored
> > with the help of a webcam and a barcode reader program (like zbar).
> Why not use Paperkey and QR-encode that instead?

The idea of Paperkey is to reduce the output, so that it can be easily
typed by hand
(when you need to restore the key).
For a 4096 key, the output of Paperkey is still too big to be typed by
hand, and even
too big to be QR-encoded straight away. You have to split it and QR-encode
each piece

But once you have to split the data and QR-encode it, it doesn't make much
difference whether you have 2 pages of output or 8 pages. So, it doesn't
make sense
reducing the output, and it doesn't make sense using Paperkey anymore. At
this point
Paperkey only makes things more complex, instead of making them simpler.

Thanks to everybody for the feedback.

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