FreeSecurity is a small, simple, easy to use software which allows you to use encryption to secure your files and safeguard your privacy.
FreeSecurity uses strong 128-bit AES encryption (also known as Rijndael), the next generation US Goverment standard for protection of classified information (according to the National Institute of Standards and Technology, it would take about 149 trillion years to break an AES key using usual methods) which offers a great level of protection to your files.
Additionally, it offers file compression on the encrypted files. You can, for example, keep it in your USB storage device and use it to compress files when you lack space or to encrypt the files to keep their content private.
NOTE: FreeSecurity is free for non-commercial use.