Here are all the codes and ciphers you should know to be a professional spy. No one will be able to crack the code unless they have that special secret something with them.
The Caesar Shift Cipher
This is a very simple alphabet cipher, but the key to making it easy is knowing the key number. Say the key number is 5. A becomes F, J becomes O, and Z becomes E and so on. “Adam rakes his yard” becomes, “FIFR WFPJX MNX DFWI.” Whoever you are sending your secret code to must know the key number or they wont be able to break the code.
Numbers
A=1, B=2, C=3 etc, all the way to Z=26. This cipher wouls be very easy to break on its own, but add the Caesar Code to it and you will make anyone trying to break the code go mad. In the basic method, “the dog is better” would be “20 8 5-4 15 7-9 19-2 5 20 20 5 18.” But say you add a Caesar Cipher number key of 3, this same message becomes “3 23 11 8-7 18 10-12 22-5 8 23 23 8 21.” Once again, the key to deciphering this code is the know the key number.
Alphabet Ciphers
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z
In this sequence, “How are You?” would be, “UBJ NER LBH”
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Z Y X W V U T S R Q P O N M L K J I H G F E D C B A
In this sequence, “How are You?” would be, “SLD ZIV BLF”
You and the reader both need to have the right alphabet sequence or this cipher wont work.
The Code Stick
Take a normal piece of Xerox paper and cut a ½ inch slice of it the long way. Wrap this tightly around a brand new pencil. Write one or two letters on each little wind so that you have a clear message. Now unwind the paper and write more letters all over the place so that it looks like its only a bunch of gibberish. Give this piece of paper to someone else with a brand new pencil and have them wrap the note around it and they will be able to get the hidden note.
Codeword Alphabet Substitution
This is modeled after the second example in the Alphabet Ciphers.
You and whoever you are passing the code on to need to agree on a key word. Say the key word is, “BAIT.” This is what the alphabet would look like. (Keep in mind that the letters you use don't get repeated so just skip right over the ones that have already been used.)
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
B A I T Z Y X W V U S R Q P O N M L K J H G F E D C
In this alphabet, “I'll be back” would be “VRR AZ ABIS.”
