"/home/yossef/notes/personal/hashing/rail_fence.md"

path: personal/hashing/rail_fence.md

- **fileName**: rail_fence
- **Created on**: 2025-03-21 04:09:37

rail fence ;)

import numpy as np

# encrption rail fence
def encryption(plain_text: str, dim: int) -> str:
    encryption_text = ""

    # Calculate number of columns based on the text length and rows (dim)
    column_matrix = len(plain_text) // dim + (len(plain_text) % dim != 0)

    # Create an empty matrix with dimensions (dim x columns)
    matrix = np.full((dim, column_matrix), '', dtype='<U1')

    # Fill the matrix row by row
    row, col = 0, 0
    for char in plain_text:
        matrix[row][col] = char
        row += 1

        # Move to the next column when we hit the last row
        if row == dim:
            row = 0
            col += 1

    # Read the matrix row by row to get the encrypted text
    encryption_text = ''.join(''.join(matrix[row, :]) for row in range(dim))

    return encryption_text


def main():
    plain_text = "yossef"
    """
    y s 
    o e
    s f
    -> ysoesf
    """
    dim = 3
    print("encryption:",encryption(plain_text, dim))

# encryption: ysoesf
if __name__ == "__main__":
    main()

continue:[[]]
before:./vigenere_cipher2.md