Caeser Cipher is robust against to brute force attack
In cryptography, we are interested in fields with a finite number of elements
AES and DES both follow Feistel Cipher Structure and hash algorithms
S-box in AES is used to provide diffusion
Shift rows in DES, is one form of diffusion
The key size in DES is 64 bits , and only 56 bits are used for the encryption procedure