On 5/15/07, Casey Jones <[EMAIL PROTECTED]> wrote: > There appears to be an open source project going for PDF417 > http://en.wikipedia.org/wiki/PDF417
We've used PDF417 for conference attendee badges in the past. They work well, and there seems to be quite a bit of hardware and software out there to support them. However, using *any* secondary encoding technique mroe complex than base64 is going to make recovery of the key that much more difficult down the road. Have you ever tried to recover a 15 year old file from floppy or tape? Just figuring out what the file format *is* can be a challenge. I would suggest using plain old base64 ASCII and a large version of a font like OCR-A or OCR-B. You can include par2 information, also base64 encoded, but finding software to use that data for recovery may be difficult many years in the future. Simply printing multiple copies of the page for OCR and diffing for errors would probably be easier. Finally, consider the paper and ink/toner you use... some cheaper paper is very acid, and some toner flakes over time. Regards, -- RPM _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
