You may want to check out my blog post about key backup[1]. In it I mention two bar-code style backup solutions: * PaperBack [2] * Twibright Optar [3]
I also investigated QR codes and other 2D bar codes.. however they did not seem to scale well to large amounts of data... I found that PaperBack, while being a Win32 app (runs fine in Wine) works beautifully for storing quite a bit of data with redundancy and handling for user-level printers. Quoting the page "If you have a good laser printer with the 600 dpi resolution, you can save up to 500,000 bytes of uncompressed data on the single A4/Letter sheet." ... quite a bit to store your entire secret keyring ... though you could use paperkey + this to permit bumping up redundancy / dot-size quite a bit. Twibright Optar has quite a bit of promise, but requires quite a bit of pre-processing and noise removal (not to mention source-code edit to change dot-size to work nicely with non-super printers). 1: http://blog.eharning.us/2011/04/key-backup-for-paranoid.html 2: http://ollydbg.de/Paperbak/ 3: http://ronja.twibright.com/optar/ On Fri, Jan 4, 2013 at 4:01 AM, Branko Majic <[email protected]> wrote: > On Thu, 3 Jan 2013 23:42:07 -0500 > David Shaw <[email protected]> wrote: > >> Paperkey 1.3 is released. This adds ECC key support (both ECDH and >> ECDSA) as well as a few more minor tweaks. >> >> Source and Win32 binaries are available at: >> http://www.jabberwocky.com/software/paperkey/ > > Curious piece of software. Certainly not something that comes to mind > right away for making backups. > > I wonder if you could back-up even more by using 2D bar code for an > output? > > Best regards > > -- > Branko Majic > Jabber: [email protected] > Please use only Free formats when sending attachments to me. > > Бранко Мајић > Џабер: [email protected] > Молим вас да додатке шаљете искључиво у слободним форматима. > > _______________________________________________ > Gnupg-users mailing list > [email protected] > http://lists.gnupg.org/mailman/listinfo/gnupg-users > -- Thomas Harning Jr. (http://about.me/harningt) _______________________________________________ Gnupg-users mailing list [email protected] http://lists.gnupg.org/mailman/listinfo/gnupg-users
