Enigma 1.0 requires Windows version 3.1 and a 286. It requires about 600K of memory, and about 300K of disk space.
To encrypt or decrypt files select "Open..." from the Enigma file menu. You will be prompted for a key. The files will be automatically encrypted and/or decrypted depending on their type. Depending on the options you have selected you will need to enter a key and output filename for each file.
Figure 1 The above figure asks the user to select the file for encryption.
Figure 2 The above figure requests the user to enter an encryption key.
Enigma will automatically determine if the file should be encrypted or decrypted by looking at the file extension. Files with the extension .DSL are assumed to be limited DES encrypted files, files with the extension .DES are full DES encrypted files, and all others are unencrypted files. You can manually override Enigmas default action during key entry if you desire. The only reason to ever override Enigma's default selection is if you are double or triple encrypting a file; or decrypting a file encrypted on a Macintosh which does not have the default file ex
Figure 3 The .dsl extension is automatically added to the file name when encrypted..