Poland Cross
The Cross Cipher (also known as Polish Cross Cipher) is a simple substitution cipher that uses a cross-shaped grid pattern to encode messages. Each letter of the alphabet is assigned a unique position within the cross pattern, and letters are replaced by coordinates that describe their location in the grid.
Poland cross tool. Source: Skaut Lisak
Encoding
To encode a message, convert each letter to its corresponding shape of cross and its position specified by dot inside shape.
- H →
- E →
- L →
- L →
- O →
- Find letter in cross
- Draw shape of border which is around them
- Draw the dot to specified position (LEFT, CENTER, RIGHT)
Decoding
To decode, split the message by spaces and convert each pattern back to its corresponding letter:
- Separate the encoded message into glyph
- Search for glyph border shape in table
- Search where is drawed dot -> the letter is decoded letter
We will repeat the process for the whole message
Example
Input: HELLO WORLD
Encoded:
Decoded: HELLO WORLD