Mastercrypt - Version 2.0 Mastercrypt allows you to maintain the privacy of your sensitive data by applying file encryption. It's secure and easy to use. It lets you add as many files and folders as you like to a list you can encrypt in a single operation. Rather than supplying a password, Mastercrypt uses a key file of its own creation. Without the key file and a copy of Mastercrypt, these encrypted files are inaccessible. You have the option of overwriting and/or deleting the original files. Mastercrypt also allows you to save and load file lists so you can quickly perform repeated multiple file operations. Other features include password protection, command-line support and zip file compression. 4 stars at ZDNet.