Data Security: Cryptsetup

Data Security: Cryptsetup

Cryptsetup

according to the MAN page:

cryptsetup - manage plain dm-crypt and LUKS encrypted volumes

..cryptsetup is used to conveniently setup dm-crypt managed device-mapper mappings. These include plain dm-crypt volumes and LUKS volumes. The difference is that LUKS uses a metadata header and can hence offer more features than plain dm-crypt...

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• Installing Cryptsetup:

sudo apt install cryptsetup

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***SETUP***

• Creating a container:

dd if=/dev/urandom of=~/my_encrypted_drive.dd bs=1M count=256

• Format it:

sudo cryptsetup luksFormat ~/my_encrypted_drive.dd

• Opening it:

sudo cryptsetup luksOpen ~/my_encrypted_drive.dd my_drive

my_drive will appear in /dev/mapper/.

• Create a filesystem within it:

mkfs -t ext4 /dev/mapper/my_drive

• Mount the container:

sudo mount -t ext4 /dev/mapper/my_drive ~/mnt/

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***Consequence run***

sudo cryptsetup luksOpen ~/my_encrypted_drive.dd my_drive

sudo mount -t ext4 /dev/mapper/my_drive~/mnt/

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• Unmounting:

sudo umount ~/mnt/

sudo cryptsetup luksClose my_drive

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• Changing Password/Passphrase:

sudo cryptsetup luksChangeKey my_encrypted_drive.dd

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• for more usage and help:

cryptsetup --help

man cryptsetup

Read more at Cryptsetup Homepage and Wikipedia .

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note:
device => my_encrypted_drive.dd

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