$sudo mount -t ecryptfs ./encrypt_data ./encrypt_data Select key type to use for newly created files: 1) openssl 2) passphrase Selection: 2 Passphrase: Select cipher: 1) aes: blocksize = 16; min keysize = 16; max keysize = 32 (loaded) 2) des3_ede: blocksize = 8; min keysize = 24; max keysize = 24 (not loaded) Selection [aes]: aes Select key bytes: 1) 16 2) 32 3) 24 Selection [16]: 16 Enable plaintext passthrough (y/n) [n]: n Enable filename encryption (y/n) [n]: n Attempting to mount with the following options: ecryptfs_unlink_sigs ecryptfs_key_bytes=16 ecryptfs_cipher=aes ecryptfs_sig=2f14d8d2187bd785 WARNING: Based on the contents of [/root/.ecryptfs/sig-cache.txt], it looks like you have never mounted with this key before. This could mean that you have typed your passphrase wrong. Would you like to proceed with the mount (yes/no)? : yes Would you like to append sig [2f14d8d2187bd785] to [/root/.ecryptfs/sig-cache.txt] in order to avoid this warning in the future (yes/no)? : yes Successfully appended new sig to user sig cache file Error mounting eCryptfs: [-13] Permission denied Check your system logs; visit <http://launchpad.net/ecryptfs>