Polybius Square Cipher (encoder / decoder) Examples

1. Polybius Square Cipher encoder

Text : ABCD efghi
Alphabet25 : abcdefghiklmnopqrstuvwxyz
Separator :
Row Heading : 12345
Column Heading : 12345
Coordinates Read Order : Row then Column

Solution:

The Polybius square cipher is a 5x5 grid-based substitution cipher, that converts each letter into pair of coordinates (row, column)

Alphabet = abcdefghiklmnopqrstuvwxyz

	1	2	3	4	5
1	a	b	c	d	e
2	f	g	h	i	k
3	l	m	n	o	p
4	q	r	s	t	u
5	v	w	x	y	z

Plaintext	a	b	c	d	e	f	g	h	i
Text Position (Cipher)	11	12	13	14	15	21	22	23	24

Plaintext	: abcdefghi
Ciphertext	: 11 12 13 14 15 21 22 23 24

2. Polybius Square Cipher encoder

Text : hello world
Alphabet25 : abcdefghiklmnopqrstuvwxyz
Separator :
Row Heading : 12345
Column Heading : 12345
Coordinates Read Order : Row then Column

Solution:

The Polybius square cipher is a 5x5 grid-based substitution cipher, that converts each letter into pair of coordinates (row, column)

Alphabet = abcdefghiklmnopqrstuvwxyz

	1	2	3	4	5
1	a	b	c	d	e
2	f	g	h	i	k
3	l	m	n	o	p
4	q	r	s	t	u
5	v	w	x	y	z

Plaintext	h	e	l	l	o	w	o	r	l	d
Text Position (Cipher)	23	15	31	31	34	52	34	42	31	14

Plaintext	: helloworld
Ciphertext	: 23 15 31 31 34 52 34 42 31 14

This material is intended as a summary. Use your textbook for detail explanation.
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1. Examples