Monoalphabetic Cipher With Example In Tamil

A **Monoalphabetic cipher** is a type of substitution cipher where each letter in the plaintext is replaced by another letter from a fixed substitution alphabet. This cipher uses a one-to-one mapping of letters, meaning each letter of the plaintext corresponds to a single, unique letter in the ciphertext. The substitution alphabet can be a simple shift (like the Caesar cipher) or a randomly shuffled alphabet. While easy to implement, monoalphabetic ciphers are vulnerable to frequency analysis, where common letters in the language (like 'e' or 't') can reveal patterns in the ciphertext, making it easy to break.