Bifid Cipher

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by chaeberryyyyy

by chaeberryyyyy

-ENCRYPTION-

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 "Pandora"

-To encipher the message,write the row and column numbers of the letters in two rows below the message.

P A N D O R A
3 1 3 1 3 4 1
5 1 3 4 4 2 1

Then the digits are read off by rows,in pairs and converted back to letters.

31 31 34 15 44 21 -> L L O E C T F

So the cipher text is "LLOECTF"

*Encrypt it using polybius square.

-DECRYPTION-

-Separate every whole number to each other.

3 1 3 1 3 4 1 5 1 3 4 4 2 1

-Count the numbers into and group them into two.

3 1 3 1 3 4 1
5 1 3 4 4 2 1

35-P
11-A
33-N
14-D
34-O
42-R
11-A

Cttro.