Transposition cipher

A transposition cipher is a method of encryption where the positions of the letters in the plaintext are shifted according to a certain system to create the ciphertext. Unlike substitution ciphers, which replace letters or groups of letters with other letters or groups, transposition ciphers rearrange the existing characters without changing them. ### Key Features of Transposition Ciphers: 1. **Rearrangement**: The primary mechanism behind a transposition cipher is the rearrangement of characters in the plaintext to produce the ciphertext.