Praxis mit GnuPG Verschlüsseln und entschlüsseln: $ gpg --recipient=Bob --encrypt $DATEI $ gpg --decrypt $DATEI You need a passphrase to unlock the secret key for user: "Alice (Crypto Girl) " 1024-bit ELG-E key, ID 2FC52FD9, created 2004-11-28 (main key ID 69EEE24D)