From Sadegh Mosavi:
Secure text is a program to crypt your text with high security. It works by changing your text character to another. For example you can set the secure Text for changing 'a' to '7g'. You can create a 'key file' and save all your Crypt data (example: 'a' change to '7g') to it. Version 1.6 may include unspecified updates, enhancements, or bug fixes.