Instructions for using the KeyPhrase program.
You can download and save the Keyphrase program file either on diskette or on your hard drive.
If you choose to save it on diskette, you must double click on "My Computer", choose the "A" or "B"
drive (whichever is your disk drive), and double click on the tv icon for KeyPhrase. If you choose
to save the file on your hard drive, create a file with an appropriate name and copy the files to it.
This program is used to encipher a message using a key phrase and includes provision for a crib if
you wish to include one.
The first screen contains the credits for the program.
The second screen shows the rules for this cipher according to "The ACA And You".
The third screen shows an example of the output for this program.
Screen four asks for your key phrase.  This must be exactly 26 letters long without
spaces and must be complete.  You can type it in either in lower case or in upper case.
Screen five asks for your message.  You can include all normal punctuation.  Since Turbo Pascal
does not support the use of the apostrophe in a string, you must use the ` just above the tab key
and directly beneath the tilde ~. (At least it is on my keyboard.)
Screen six asks for a crib or word(s) to be used as a tip for solvers.  If you do not wish to include
one, just press the spacebar once and press "Enter".
The final screen will appear.  It will show the plain alphabet, the keyed alphabet, the plaintext
message, the enciphered message, the tip (if any) and its encipherment.
To print this screen, press "Shift" and "Print Screen" at the same time.  The DOS version allows this
function to work.  When finished, press "Enter" to exit program.
Programming Notes.
My variable names leave a lot to be desired.  Since I am including the source code, feel free to change
whatever you like.  This program was written in Turbo Pascal ver. 7 for DOS so you will need a Pascal
compiler such as the Borland version or Free Pascal which is essentially a DOS clone.  It works just
as well.  You can get a copy with the book "Programming for Dummies" which I find to be a very good
introduction to programming.
I used a procedure named "caps" to change all lower case letters to upper case.  You might find a
better and shorter way to accomplish the same thing.
Again I wish to thank Mr. Russell Atkinson for his kind help.
Archie Bullington
"The Flying Dutchman"
If you wish to contact me, my e-mail address is: archieb42164@yahoo.com