Drag'n'Crypt ULTRA is a small file encryption tool that supports Twofish Encryption algorithm. It uses a very handy "drop box" interface to make encryption and decryption fast and easy.Note: Starting from version 2.2.0, Drag'n'Crypt ULTRA is no longer backwards-compatible with data encrypted using Blowfish or TEA. Download the ZIP package and extract to a folder of your choice. Launch DCU.exe.