What is Tap Code?
• Tap code is a code similar to Morse code and is commonly used by prisoners in jail to communicate with one another. It uses polybius square table for basis.
• Communicated by two taps, first tap for the horizontal row and second tap for the vertical row.
1 2 3 4 5
1 A B C D E
2 F G H I/J K
3 L M N O P
4 Q R S T U
5 V W X Y Z
Who invented Tap Code?
• It was invented by four POWs imprisoned in Vietnam and is sometimes called "Smitty Code" after Captain Carlyle "Smitty" Harris—an Air Force Instructor who had shown him a code based on a five-by-five alphabet matrix(Polybius Square)
Tap Code Alphabet:
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 ••••• •••••
Encryption:
Just type the corresponding taps(dot/s) to your plaintext value.
Sample:
GWAPOQ
•• •• | ••••• •• | • • | ••• ••••• | ••• •••• | •••• • |
Decryption:
Simply finding the value of the tap code to its corresponding plaintext value.
Sample:
••••• •• | • • | •••• •••• | •••• ••• | ••• •••• | ••• ••• |
Message: WATSON
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CODES AND CIPHERS
RandomThis book is for those who want to learn more about codes and cipher. How to encrypt the message and also on how to decrypt the encoded message.
