Full description
Cryptmount was written to make it as easy for ordinary users
to access encrypted filesystems on-demand using the newer devmapper
mechansism as it was to use the older, now deprecated, cryptoloop methods.
This offers the following advantages:
Access to improved functionality in the kernel
Transparent support for filesystems stored on either raw disk partitions or loopback files
Separate encryption of filesystem access keys, allowing access passwords to be changed without re-encrypting the entire filesystem
Storing multiple encrypted filesystems within a single disk partition, using a designated subset of blocks for each
Rarely used filesystems do not need to be mounted at system startup
Un-mounting of each filesystem is locked so that this can only be performed by the user that mounted it, or the superuser
Encrypted filesystems compatible with cryptsetup
Encrypted access-keys can be chosen to be compatible with openssl, or managed via libgcrypt, or (for 2.0 release-series) built-in SHA1/Blowfish ciphers
Support for encrypted swap partitions (superuser only)
Support for setting up encrypted filesystems or crypto-swap at system boot-up