The Vigenère Tableau

The following is the tableau used for the Vigenère, Beaufort, and variant Beaufort ciphers.

   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
B  B C D E F G H I J K L M N O P Q R S T U V W X Y Z A
C  C D E F G H I J K L M N O P Q R S T U V W X Y Z A B
D  D E F G H I J K L M N O P Q R S T U V W X Y Z A B C
E  E F G H I J K L M N O P Q R S T U V W X Y Z A B C D
F  F G H I J K L M N O P Q R S T U V W X Y Z A B C D E
G  G H I J K L M N O P Q R S T U V W X Y Z A B C D E F
H  H I J K L M N O P Q R S T U V W X Y Z A B C D E F G
I  I J K L M N O P Q R S T U V W X Y Z A B C D E F G H
J  J K L M N O P Q R S T U V W X Y Z A B C D E F G H I
K  K L M N O P Q R S T U V W X Y Z A B C D E F G H I J
L  L M N O P Q R S T U V W X Y Z A B C D E F G H I J K
M  M N O P Q R S T U V W X Y Z A B C D E F G H I J K L
N  N O P Q R S T U V W X Y Z A B C D E F G H I J K L M
O  O P Q R S T U V W X Y Z A B C D E F G H I J K L M N
P  P Q R S T U V W X Y Z A B C D E F G H I J K L M N O
Q  Q R S T U V W X Y Z A B C D E F G H I J K L M N O P
R  R S T U V W X Y Z A B C D E F G H I J K L M N O P Q
S  S T U V W X Y Z A B C D E F G H I J K L M N O P Q R
T  T U V W X Y Z A B C D E F G H I J K L M N O P Q R S
U  U V W X Y Z A B C D E F G H I J K L M N O P Q R S T
V  V W X Y Z A B C D E F G H I J K L M N O P Q R S T U
W  W X Y Z A B C D E F G H I J K L M N O P Q R S T U V
X  X Y Z A B C D E F G H I J K L M N O P Q R S T U V W
Y  Y Z A B C D E F G H I J K L M N O P Q R S T U V W X
Z  Z A B C D E F G H I J K L M N O P Q R S T U V W X Y

Vigenère

The leftmost column has the keys; the top alphabet has the plaintext. So:
message HELLOWORLD

key     ECSECSECSE

cipher  LGDPQOSTHD



Beaufort

Find the plaintext in the left alphabet, and trace in until you find
the key letter. Then turn a right angle and go up. The letter at the
top alphabet is the ciphertext.
message HELLOWORLD

key     ECSECSECSE

cipher  WYHSOWPLHB



Variant Beaufort

Find the key letter in the left alphabet, and trace in until you find
the plaintext  letter. Then turn a right angle and go up. The letter at
the top alphabet is the ciphertext.
message HELLOWORLD

key     ECSECSECSE

cipher  DCTHMEKPTZ




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Department of Computer Science


University of California at Davis


Davis, CA  95616-8562



Page last modified on 1/15/99