Bifid Decoder
Cipher Text
Period
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Polybius square size
5x5
6x6
Keyword
Pattern
HORIZONTAL
VERTICAL
SPIRAL - CLOCKWISE
SPIRAL - COUNTERCLOCKWISE
CRAB SPIRAL - CLOCKWISE
CRAB SPIRAL - COUNTERCLOCKWISE
DIAGONAL - NORTHEAST
DIAGONAL - SOUTHEAST
DIAGONAL - SOUTHWEST
DIAGONAL - NORTHWEST
Boustrophedon
Starting corner
UPPER LEFT
UPPER RIGHT
LOWER LEFT
LOWER RIGHT
A
B
C
D
E
F
G
H
I
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z