> Know of a system that can take binary data and output an image to be > printed out, that is then capable of extracting that binary data from > an imperfect scan of the image.
QR coding is pretty nice. 3kb of binary storage per bitmap, and it's an international standard: ISO/IEC 18004. There may be an open- source implementation of it already. If there's not, you could do the community a favor by writing one. :) http://en.wikipedia.org/wiki/QR_Code _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
