Nihilist Substitution Cipher

Description

A mixed alphabet is is generated and used to fill a table. The first column and the first line contain the symbols that will be used to represent the plain text letters. Using the key MASTER, we obtain:
0 1 2 3 4
0 M A S T E
1 R B C D F
2 G H I K L
3 N O P Q U
4 V W X Y Z
To encipher, the letters of the plain text are encoded by the numbers in the first column and first row of the table (e. g. N is enciphered as 01 and O is enciphered as 31). For the word MESSAGE we obtain 00 04 02 02 01 20 04.

The letters of the second key are encoded the same way. Using the key MIND we obtain: 00 22 30 13.

Finally, these two series are added:

Plain text: M E S S A G E
00 04 02 02 01 20 04
Additive key:  M I N D M I N
00 22 30 13 00 22 13
Cipher text 00 26 32 15 01 42 34
Beside the key words and alphabet you may choose how the mixed alphabet is generated. By choosing no second key you may opt for using the first key as second, additive key, too.

The cipher can't conserve the capitalization or text structure. It does only accept alphabets with 25 (=5 x 5) or 36 (=6 x 6) letters.


Checkerboard Cipher

This cipher differs from the nihilist substitution in that you must enter two additional key words for the coordinate labels while no additive key is used:

You may enter a key word (or key phrase) longer then required to supply coordinates for all columns / rows, as shown above. The letters from the key for the row (column) coordinates are written top-down (left to right). If a letter appears more than once, is is only used at it's first appearance. For the example given above, the result is:

E 

I

N 

D

T 

K

R 

Y

H 

 

E S Y E N T R H
N C K Y A B C
T O D F G I L
R D M O P Q S
H K U V W X Z
To encipher, a letter of the plain text is represented by the labels in the first column and first row. If there is more than one possibility, one is chosen at random. Thus the word MESSAGE may be enciphered as REEER HDHNK TTSI, RISER HDHNT TTSI, DEYID HDHNT TTEI, ...

As before, the cipher can't conserve the capitalization or text structure. It does only accept alphabets with 25 (=5 x 5) or 36 (=6 x 6) letters.


M Del Vayo Cipher

A variant of the checkerboard cipher. The checkerboard used is:
0
9
8
7
6
5
4
O
1
B
C
F
G
H
I
J
K
N
P
2
Q
R
S
T
U
W
X
Z
.
/
Letters found in the first line are encoded by a single digit, e.g. E = 8. Letters of the other lines are encoded as pairs, e.g. T = 27. So TEST is encoded as 27828 27.

At present, you may only specify the key word and how the alphabet is scrambled.


To proceed, you may