I know that I can do (edit: fixed this; I'm interested in gpg NOT openssh)
...to change my passphrase for my key, but I'm not sure what this means.
If I'm encrypting data on box A and decrypting on box B (say with duplicity) do I have to change the passphrase on both ends? Will previous backups still work?
Is the passphrase just the key to a sort of encrypted wrapper around the key file?
Dumb question, but I don't want to screw this up. Thanks!