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+Start out by identifying your device name. Insert the usb stick and run in a terminal:
+<code>
+dmesg
+</code>
+The output would be something like this:
+<code>
+........
+........
+[17028.141759] usb-storage: device found at 20
+[17028.141772] usb-storage: waiting for device to settle before scanning
+[17033.140314] usb-storage: device scan complete
+[17033.141276] scsi 9:0:0:0: Direct-Access              Flash Disk       5.00 PQ: 0 ANSI: 2
+[17033.185463] sd 9:0:0:0: [sdc] 1998848 512-byte hardware sectors (1023 MB)
+[17033.186669] sd 9:0:0:0: [sdc] Write Protect is off
+[17033.186682] sd 9:0:0:0: [sdc] Mode Sense: 0b 00 00 08
+[17033.186688] sd 9:0:0:0: [sdc] Assuming drive cache: write through
+[17033.194505] sd 9:0:0:0: [sdc] 1998848 512-byte hardware sectors (1023 MB)
+[17033.196549] sd 9:0:0:0: [sdc] Write Protect is off
+[17033.196563] sd 9:0:0:0: [sdc] Mode Sense: 0b 00 00 08
+[17033.196569] sd 9:0:0:0: [sdc] Assuming drive cache: write through
+[17033.197444]  sdc: sdc1
+[17033.199662] sd 9:0:0:0: [sdc] Attached SCSI removable disk
+[17033.200242] sd 9:0:0:0: Attached scsi generic sg3 type 0
+........
+........
+</code>
+This device is called /dev/sdc and the partition is sdc1.
+Unmount the device so we can massage the partitions on it :)
+Use whatever tool you like to format the stick into a ext3 partition. **WARNING** THIS WILL DELETE ALL DATA ON THE STICK!!
+Install cryptsetup:
+<code>
+sudo apt-get install cryptsetup
+</code>
+Now create the encrypted partiton:
+<code>
+sudo luksformat -t ext3 /dev/sdc1
+Creating encrypted device on /dev/sdc1...
+WARNING!
+========
+This will overwrite data on /dev/sdc1 irrevocably.
+Are you sure? (Type uppercase yes): YES
+Enter LUKS passphrase:
+Verify passphrase:
+Command successful.
+Please enter your passphrase again to verify it
+Enter LUKS passphrase:
+key slot 0 unlocked.
+Command successful.
+mke2fs 1.41.3 (12-Oct-2008)
+Filesystem label=
+OS type: Linux
+Block size=4096 (log=2)
+Fragment size=4096 (log=2)
+inodes, 248742 blocks
+blocks (5.00%) reserved for the super user
+First data block=0
+Maximum filesystem blocks=255852544
+block groups
+blocks per group, 32768 fragments per group
+inodes per group
+Superblock backups stored on blocks:
+, 98304, 163840, 229376
+Writing inode tables: done
+Creating journal (4096 blocks): done
+Writing superblocks and filesystem accounting information: done
+This filesystem will be automatically checked every 29 mounts or
+days, whichever comes first.  Use tune2fs -c or -i to override.
+</code>
+É voila you now have an encrypted usb stick. Now test it out by ejecting it and plug it back in:
+{{:howtos:unlock_encrypted_data.png|}}
+Enter your password and you should see it get mounted:
+{{:howtos:unlocked_encrypted_data.png|}}
+=== And do I have to remind you that if you loose the unlock password you will never recover your data on the stick....?? ;) ===
+----
+//Source: http://www.fabianrodriguez.com/blog/2009/01/21/easy-removable-storage-encryption-that-works-with-hardy-and-intrepid///