This type of cipher substitutes each letter in the plaintext with another letter or symbol in the ciphertext. One common type of substitution cipher is the Caesar cipher, which shifts each letter by a certain number of positions in the alphabet.
This type of cipher substitutes each letter in the plaintext with another letter or symbol in the ciphertext. One common type of substitution cipher is the Caesar cipher, which shifts each letter by a certain number of positions in the alphabet.