No- this is not about Egyption mummies in crypts, but disguising sensitive information.
While the most famous commercial encryption software is from www.pgp.com , which has options for encrypting whole disk, or shredding files beyond recovery
GnuPG is the GNU project‘s complete and free implementation of the OpenPGP standard as defined by RFC4880 . GnuPG allows to encrypt and sign your data and communication, features a versatile key managment system as well as access modules for all kind of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications. A wealth of frontend applications and libraries are available. Version 2 of GnuPG also provides support for S/MIME.
Some other alternatives are at http://readerszone.com/security/10-free-open-source-encryption-utilities.html