Character Cipher
One letter can be replaced by another letter in Character cipher. They are simple to use and
easy to crack. In Character cipher or Symbol ciphers, individual symbols are used in the
plaintext as the unit to encrypt or decrypt.
Block Cipher
Block cipher encrypts 64 or 128 or 256 bits at a time.
It uses data diffusion and confusion to encrypt plaintext.
Encryption of more bits at a time makes the decryption more complex in Block cipher.
