Windows Data Encryption Standard DLL - Version 2.1 Win32 DLL does 64-bit Data Encryption Standard (DES). Works on blocks of data in RAM, so you can use it to scramble passwords. Evaluation Kit includes C and Visual Basic interface source code. Fast and Reliable; in use for over 10 years; version 2.1 doubles speed ut and supports our Triple-DES 128-bit security Win3DES DLL. Registration provides Win3DES Evaluation and ready-to-run filter programs which encrypt and decrypt standard input streams and files.