"cryptfs allows you to encrypt some filesystems"Edit by Brothersoft: These are some helper tools to make use of the device mapper Crypt target which is available in the Linux kernel 2.6.4 and later. I wrote them mainly for my personal use, so they are especially designed for my needs, but perhaps you'll find them similarly useful.The device mapper is used by LVM2 (logical volume management version 2), but can be utilized without it. It makes it possible to map sections of block devices (e.g. partitions) to new block devices, whose nodes normally will be created in /dev/mapper. dm-crypt encrypts and decrypts the data during the mapping using a specified Algorithm (all ciphers of the kernel can be used) and a given key.