borg-change-passphrase - Change repository key file passphrase
borg [common options] change-passphrase [options] [REPOSITORY]
The key files used for repository encryption are optionally passphrase
protected. This command can be used to change this passphrase.
Please note that this command only changes the passphrase, but not
any secret protected by it (like e.g. encryption/MAC keys or chunker seed).
Thus, changing the passphrase after passphrase and borg key got compromised
does not protect future (nor past) backups to the same repository.
The Borg Collective