Printing Keys and using OCR (was: Proofreadable base64)
brian at briansmith.org
Fri Sep 21 08:48:02 CEST 2007
Peter Palfrader wrote:
> Nice idea. When trying to find decent backup methods for my
> new Tor identity key I cam accross this thread.
> I played all day with ocr and friends. In the course I wrote
> a small script that does what you suggest. I tried to keep
> it small enough to print it along with whatever data you have
> - I clearly failed there.
> But other than that it works nicely.
> That didn't work out so well at first
> - gocr had real trouble distinguishing zeroes and the
> letter D like Delta.
Why not use a 2D barcode like a QR code? A QR code will hold most
typical keys, is easy for machines to read, is small, and has redundancy
features that allow it to work even if you hole-punch or black out part
of the code.
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