cryptmount

About cryptmount

From Debian's package description

cryptmount is a utility for creating encrypted filesystems & swap partitions and which allows an ordinary user to mount/unmount filesystems without requiring superuser privileges.

It offers the following features:

• easy and safe on-demand access to filesystems without su/sudo;
• access passwords can be changed easily without involving the sys-admin;
• filesystems can reside on raw disk partitions or ordinary files;
• supports LUKS encrypted filesystems created by cryptsetup;
• encrypted access keys can be stored on removable media (e.g. USB flash disks);
• includes support for encrypted swap partitions;
• multiple filesystems can be stored in a single disk partition;
• encrypted filesystems can be initialized at boot-up or on demand;
• temporary filesystems can be setup via command-line, for use in shell-scripts;
• transparent configuration of dm-crypt & loopback devices during mounting;

From Debian's description of the cryptmount package, under that package's license.