Make sure that your system is set up to auto-load
your filesystem kernel module on mount.

Try with this in console:
$ modprobe ecryptfs
$ lsmod | grep ecryptfs

C yaa..

Aborting mount.
Error processing sig; rc = [-22]
Error mounting eCryptfs; rc = [-22]; strerr = [Invalid argument]. Check your system logs; visit .

iceman600@UBUNTU-DESKTOP:~$ sudo mount -t ecryptfs ~/secret ~/secret

Unable to get the version number of the kernel
module. Please make sure that you have the eCryptfs
kernel module loaded, you have sysfs mounted, and
the sysfs mount point is in /etc/mtab. This is
necessary so that the mount helper knows which
kernel options are supported.

Make sure that your system is set up to auto-load
your filesystem kernel module on mount.

Enabling passphrase-mode only for now.

Select key type to use for newly created files:
1) pkcs11-helper
2) tspi
3) openssl
4) passphrase
Selection:

i dont know what kernel and auto load the comp is talking about…
sorry.

lenovo@ubuntu:~$ sudo mount -t ecryptfs ~/Private ~/Private

Unable to get the version number of the kernel
module. Please make sure that you have the eCryptfs
kernel module loaded, you have sysfs mounted, and
the sysfs mount point is in /etc/mtab. This is
necessary so that the mount helper knows which
kernel options are supported.

Make sure that your system is set up to auto-load
your filesystem kernel module on mount.

Enabling passphrase-mode only for now.

Select key type to use for newly created files:
1) passphrase
2) openssl
3) pkcs11-helper
4) tspi
Selection: 1
Passphrase:
Verify Passphrase:
Select cipher:
1) aes: blocksize = 16; min keysize = 16; max keysize = 32 (not loaded)
2) blowfish: blocksize = 16; min keysize = 16; max keysize = 32 (not loaded)
3) des3_ede: blocksize = 8; min keysize = 24; max keysize = 24 (not loaded)
4) twofish: blocksize = 16; min keysize = 16; max keysize = 32 (not loaded)
5) cast6: blocksize = 16; min keysize = 16; max keysize = 32 (not loaded)
6) cast5: blocksize = 8; min keysize = 5; max keysize = 16 (not loaded)
Selection [aes]:
Select key bytes:
1) 16
2) 32
3) 24
Selection [16]:
Attempting to mount with the following options:
ecryptfs_key_bytes=16
ecryptfs_cipher=aes
ecryptfs_sig=1f1d353f42d4eea4
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)? y
Aborting mount.
Error processing sig; rc = [-22]
Error mounting eCryptfs; rc = [-22]; strerr = [Invalid argument]. Check your system logs; visit .

Any suggestions are welcome!

1) If you mount your encrypted folder and you log out and log in again with the same user account, the encrypted folder will still be there and anyone can access it.

2) If you restart/shut down your PC, it will automatically unmount the encrypted folder such that it won’t be available next time you switch on your PC.

3) If you log out and log in again with another user account, the encrypted folder will not be available as it is only accessible by you only.

Proved and tested.

Hope this helps.