DataSafe - Version 5.1 DataSafe 5.1 for Windows Introduction DataSafe is a fast, easy to use file encryption program. We believe it is the fastest encryption software for desktop computers on the market today. The encryption speed is limited by the disk througput rather than by CPU cycles.Using DataSafe With the mouse select All Programs -> DataSafe -> DataSafe. A graphical user interface will appear. In order to encrypt or decrypt a file you have to select one. Files are selected in the large box with yellow background on the right. Click on a file and a text indicating if the file has been encrypted or not will appear above.