Sifr

Sifr is a free java based Encryption tool which even gives you password security. You can only encrypt plain files and HTML files with this version of Sifr. Once you encrypted a file using Sifr, the file can still be opened, but not in a readable manner. To take it back to the readable form, decrypt it using the password you have given. You can cipher only plain text files (i.e. .txt, .java, .cpp etc) with this version of Sifr. If you tried to cipher a rich text file (i.e. .doc, .xls), that file may become corrupted! Author holds no responsibility for any damage to your system or data caused by Sifr.

Requirements:

Java 1.5 or later