From the developer: "Utilize the latest in encryption technology to protect your sensitive data. Privacy tools include file/folder encryption, e-mail encryption, file/folder shredder, file/folder Backup with auto encryption, Installable Encryption Modules, Compression, Context Menu support, Stealth Media Encryption super speed for large image multimedia and exe files, and Self Decrypting Executables. Registered version has DES, and Blowfish encryption, stronger encryption available as an add on. Features an extremely flexible and easy to use interface. Files/Folders can be Encrypted, Decrypted or Shredded right from the Windows Explorer when you right click. Since the Stealth Decryptor can be downloaded free from our website, the receiver of an encrypted email message does not have to buy the program."