There is a new application available for Sparkers: FinalCrypt
What is FinalCrypt?
FinalCrypt is a cross-platform, Java based file encryption software. FinalCrypt uses unbreakable One Time Pad File Encryption designed to withstand the most serious Brute-force and Spyware attacks. The graphical user-interface with logging and command-line interface combines maximum ease of use and professional automation of encryption and reporting.
Installation (Sparky 6 & 7 amd64):
sudo apt update
sudo apt install finalcrypt
License: Creative Commons License (CC BY-NC-ND 4.0)