How to encrypt contents of a USB drive on Ubuntu 14.04 Desktop and then be able to decrypt it on any other Linux Machine?
I see Truecrypt being offered as a solution to an earlier question on this site. But, the Truecrypt landing page shows following warning now:
WARNING: Using TrueCrypt is not secure as it may contain unfixed security issues
Is there an alternative free open source disk encryption software that may be used across various Linux systems?
VeraCrypt is a good alternative. It's a fork of TrueCrypt which is still maintained. It's not in the ubuntu repos, but you can download and install it at their website.
There are other ways to do this as well, including LUKS and encrypted file systems, but VeraCrypt is simple and effective.
In order to password-protect any drive in Linux Ubuntu 22.04 (or Linux Mint 21, LMDE 6, etc.) you can use Gnome Disks GUI application ( gnome-disk-utility ) that relies on LUKS.
It works fine for an USB memory stick, and USB hard-drive, etc.
The partition has to be formatted to ext4 filesystem type. You wil be able to resize with Gparted GUI tool.
NB : You will be prompt to enter the password each time you will mount your drive on another Linux machine (to avoid typing this password everytime some desktop environments such as LMDE6 offer to memorize it for your session or forever). Remember that if you loose your password, you will also loose your data. But in case of lost or robbery of your device, no one will steal your data (on condition that you've choosen a strong password)
Some other things to consider :
