Choose language

PL, EN, ES, DE, FR, RU


Beaufort cipher - online encoder / decoder


Beaufort cipher online encoder and decoder. Encrypt and decrypt any cipher created in a Beaufort cipher.
The Beaufort cipher is a cipher belonging to the group of polyalphabetic ciphers. It is a surrogate cipher similar to the Vigenère cipher, except that it encrypts characters in a slightly different way. With our encoder you can both encrypt and decrypt each text with a Beaufort cipher. Select an encode or decode action. Enter the code key.





Beaufort cipher - encoder / decoder


Key:





Have you counted? - like and share









Beaufort cipher


The Beaufort cipher is a polyalphabetic replacement cipher similar to the Vigenère cipher, except that it encrypts characters in a slightly different way. The name of the cipher comes from the name of the English admiral Francis Beaufort, although it was created not by him, but (in 1710) by the Italian Giovanni Sestri.

It uses the substitution: $$ \phi (a)=(ki-a)\mod n\ $$ The Beaufort cipher reverses the order of the letters in the alphabet then shifts them to the right by (ki + 1) positions. This is evidenced by the following transformation: $$ \phi (a)=[(n-1)-a+(ki+1)]\mod n\ $$


The encryption uses a key and a table: 

 
    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
For example, for the keyword KEY , to encrypt the sentence "Secret message" , we put a key letter above each letter: 
KEYKEY KEYKEYKE
SECRET MESSSAGE

To encode single letters, look in the table for the column with the first letter of the message it is S. In this column we are looking for the first letter of the key which is K. The encoded letter will have the result S. Then we look for the second letter of the key in the E column, i.e. E and we get A. Then we look for the letter Y in the C column, which will give W etc. As a result of encoding, we will get a code SAWTAFYAGSMYEA 

KEYKEYKEYKEYKE
SECRETMESSSAGE
SAWTAFYAGSMYEA


More on: Wikipedia - Beaufort cipher

Users of this calculator also used

Rail Fence, Zig-Zag - encoder / decoder

Rail Fence, Zig-Zag cipher online encoder and decoder. Encrypt and decrypt any cipher created in a Rail Fence, Zig-Zag cipher.

Trifid cipher - encoder / decoder

Trifid cipher online encoder and decoder. Encrypt and decrypt any cipher created in a Trifid cipher. You can use any shift and additionally a key for more precise text encoding.

Matrix 2x2 calculator

Thanks to the mathematical calculator, you can easily calculate the determinant of the matrix, find the complement matrix, the transposed matrix, and the inverse matrix.

Fibonacci sequence calculator

Using the calculator, you can easily and quickly calculate the sum of the Fibonacci sequence, find a value or find the nth term.

Bacon cipher - encoder / decoder

Bacon cipher online encoder and decoder. Encrypt and decrypt any cipher created in a Bacon cipher.

Plaster quantity calculator

Thanks to this calculator, you can calculate how many bags we need and what weight of plaster will be needed to plaster the wall depending on its type and thickness of the applied layer.

Polygon - diagonals, height, area, perimeter, sides

Regular polygon calculator will help you calculate the diagonals of any regular polygon, side length, height, area, perimeter and radius of the circumscribed circle and the radius of the circle inscribed in a regular polygon.



Online calculator

C
M+
M-
MR
log
10x
MS
MC
asin
acos
atan
ex
sin-1
cos-1
tan-1
ln
sin
cos
tan
π
√
x²
1/x
x!
xM
(
)
exp
7
8
9
÷
4
5
6
×
1
2
3
-
0
·
=
+
C
M+
M-
sin
sin-1
asin
MC
MS
MR
cos
cos-1
acos
log
ln
10x
tan
tan-1
atan
π
e
ex
exp
1/x
x!
7
8
9
(
)
xM
4
5
6
-
÷
x²
1
2
3
+
×
√
0
·
=