Written by Kevin B. Vader - Cryptext encodes and decodes sequential files. Files encoded with have ]ct added to the destination file name. Make sure you have enough room on disk for both the source and encoded file. Docs on disk.

Disc Scrambler by S.T. Burke (typed in and uploaded to archive.org by Joseph Gordon) is a utility that can scramble the data on a disk using a two letter code as the key.  You can scramble a full disk, or just a single track or sector (block). You can also reverse this process to un-scramble the disk. 

This program can be found in the August 1989 issue of Your Commodore.  If you'd like to see a video of the program in action, you can find that here on Youtube.

Enigmuh Cipher by Joseph Gordon (2020-2022) - The Enigmuh Cipher Code Generator is a way to transmit secret messages to friends. Although modeled after the German Enigma machines, it is just a simple coding method. When starting the program, you will be asked for three wheel codes ranging from A-Z and 0-9. Next, you will be asked if you want to encrypt or decrypt a message. After answering the questions, the C64 will draw the machine and you can begin typing when the blue light in the upper right comes on. You may hear a buzzer and see a red light in the upper right corner when encrypting a message if you try to type a character not shown on the Enigmuh machine’s screen. The characters on the screen will briefly illuminate and the wheels in the upper left corner will advance when a key is pressed just like on the real Enigma. The Enigmuh has a 240 character limit and you can take a screenshot of the encrypted text and send it to your friends or post it to social media.

There are three versions of the program in this archive;  the original which doesn't include the plugin board, v2.0 that has the plugin board and version 2.1 that is compiled and has a bit more instruction text.  You can check out a video of the original here and a video of version 2.0 here.

Written by Will Corley, Finger Print 1541 lets you secretly imbed a GCR coded message onto a floppy disk.

Written by Will Corley, Occult 1541 is a single file encryption / decryption routine.  To decrypt you run the program on the encrypted file with the password.  Although it says encrypted and not decrypted after running it is.  An encrypted file will lock the computer if you try to load it.

Written by Will Corley, The Enforcer can protect a floppy disk from casual copying by searching out the first empty track and writting syncs to it.