The program generates a Hash from the given password or password_file, and then, uses it to encrypt the given file. There are no limits on the password length (32768 digits) , or the password_file. The password_file can be any file present on your computer. As an one way Hash is generated, if you forget the password or lose the password_file it is impossible to recover the original file. There are no backdoors.

System Requirements
Microsoft .NET Framework 2.0