-it uses two polybius square
-the first one is called the "plaintext polybius" and the other one is called ciphertext polybius"
-it uses a random number that is less than a million
So for example,
PLAINTEXT : The most painful goodbyes are the one's that is never said and never explained
RANDOM NUMBER : 38259
(we are going to spell the random number dahil ito ang gagamitin natin sa paggawa ng ciphertext polybius)
So here it is:
SPELLED RN : Thirty eight thousand two hundred fifty nine
"PLAINTEXT POLYBIUS"
A | F | L | Q | V
B | G | M | R | W
C | H | N | S | X
D | I/J | O | T | Y
E | K | P | U | Z
"CIPHERTEXT POLYBIUS"
(Gaya ng sinabi ko kanina, yung spelled na random number ang gagamitin natin sa paggawa ng ciphertext polybius)
T | H | I | R | Y
E | G | O | U | S
A | N | D | W | F
B | C | K | L | M
P | Q | V | X | Z
(Diba maraming nauulit na letters sa spelled na random number. So, ang ginawa ko hindi ko na ulit sinulat yung mga repeated letters then after that, I wrote all the letters that is not part of the spelled random number.)
ENCRYPTION:
The first thing that we are going to do is divide the plaintext based on the random number.
The/mostpain/fu/lgood/byesareth/eon/e'sthatar/en/evers/aidandnev/ere/xplained
Next is we are going to reverse it.
Plaintext with reversals:
EHT ¦ NAIPTSOM ¦ UF ¦ DOOGL ¦ HTERASEYB ¦ NOE ¦ RATAHTS'E ¦ NE ¦ SREVE ¦ VENDNADIA ¦ ERE ¦ DENIALPX
As you can see, the first letter is the 'letter E'. So, we are going to look for letter E in the plaintext polybius above. Nasa 5th row and 1st column siya. After that, hanapin natin sa ciphertext polybius yung letter na nasa 5th row and 1st column. It's the letter P. So, letter P is the encoded letter of the letter E. Next is the 'letter H'. It's in the 3rd row and 2nd column. Now, let's look for the letter that is located in the 3rd row and 2nd column of the ciphertext polybius. And it's the letter N. So, letter N is the encoded letter of the letter H. And so on...
CIPHERTEXT : PNLDT CVLWK OXHBK KGINL PUTWP MEDKP UTLTN LW'PDP WUPYP YPDBD TBCTP UPBPD CTIVF
