Added more info

Added extra info about using GPG, a rough idea of a workflow, and
project dependencies.

README.md

@@ -1,8 +1,37 @@
 # 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
@@ -26,3 +60,13 @@ Shell scripts to convert between ascii armor PGP keys and QR codes for paper bac
     [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.