Cryptography, Cybersecurity.
block ciphers, such as DES, AES CBC and AES ECB, or stream ciphers, such as ChaCha20 and RC4. In order to enhance security, AES has a number of rounds where parts of the key are applied. With 128-bit AES we have 10 rounds, and 14 rounds for 256-bit AES. In AES, we use an S-box to scramble the