jakob/asc-key-to-qr-code
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Added extra info about using GPG, a rough idea of a workflow, and
project dependencies.
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Kevin 2015-03-07 12:35:19 -06:00
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README.md
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# Paper Backups of Ascii PGP Keys
Shell scripts to convert between ascii armor PGP keys and QR codes for paper backup
Shell scripts to convert between ascii armor PGP keys and QR codes for paper backup.
# Convert Ascii Armor Key Files To QR Code Images
After exporting your private keys in ascii armor format, you can use the scripts
in this project to convert them to PNG images that can be printed and archived.
This is ever so slightly easier than printing the ascii key directly and using OCR
software to recreate the key.
## Dependencies
This project depends on a couple libraries that come with applicatons that are called
by these scripts.
libqrencode (http://fukuchi.org/works/qrencode/)
zbar (http://zbar.sourceforge.net)
## Export keys From GPG
To export keys from GPG use one of these commands:
gpg --armor --export > pgp-public-keys.asc
gpg --armor --export-secret-keys > pgp-private-keys.asc
gpg --armor --gen-revoke [your key ID] > pgp-revocation.asc
*NOTE* Be sure to securely remove your private and revocation keys once they
are correctly backed up. This can be done from the command line with either the 'srm'
tool on Max OS X or with 'shred' on Linux.
## Convert To QR Code Images
Use the asc2qr.sh script to convert a public or private key in ascii armor format
into QR code PNG images.
[kevin@computer]$ asc2qr.sh ~/gpg_public_key.asc
generating QR1.png
@ -13,7 +42,12 @@ Shell scripts to convert between ascii armor PGP keys and QR codes for paper bac
-rw-r--r-- 1 kevin group 6873 Mar 7 11:30 QR1.png
-rw-r--r-- 1 kevin group 1251 Mar 7 11:30 QR2.png
# Convert QR Code Images to Ascii Armor Key Files
Print the resulting images and save them in a fireproof safe or safety deposit box.
## Convert To Ascii Armor Key Files
Use the qr2asc.sh script to convert QR code images (created from an photo of
the image) to a public or private key in ascii armor format.
[kevin@computer]$ qr2asc.sh *.png
decoding QR1.png
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[kevin@computer]$ diff ~/gpg_public_key.asc mykey.asc
[kevin@computer]$
## Import Keys Into GPG
To import keys into GPG use one of these commands:
gpg --import pgp-public-keys.asc
gpg --import pgp-private-keys.asc
*NOTE* Be sure to securely remove your private and revocation keys once they
are correctly backed up. This can be done from the command line with either the 'srm'
tool on Max OS X or with 'shred' on Linux.