First, we need a polybius square.
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
Our message is "PUBLISH"
- To encipher the message,write the row and column numbers of the letters in two rows below the message.
P U B L I S H
3 4 1 3 2 4 2
5 5 2 1 4 3 3
Then the digits are read off by rows, in pairs and converted back to letters.
34 13 24 25 52 14 33 = OCIKWDN
So the cipher text is "OCIKWDN"
*Encrypt it using polybius square.
-DECRYPTION-
-Separate every whole number to each other.
34 13 24 25 52 14 33
- Count the numbers into and group them into two.
3 4 1 3 2 4 2
5 5 2 1 4 3 3
35-P
45-U
12-B
31-L
24-I
43-S
23-H
