FreeSecurity is a graphical and easy to use application that allows you to
secure your files and directories using very strong 128-bit AES encryption,
the next generation US Government standard, which offers a great level of
protection to your files. Additionally, it offers file compression on the
encrypted files. FreeSecurity is completely free (for personal use ONLY),
doesn't contain any spyware and doesn't require any registration or other
annoying process. (in System Utilities)