Data Encryption Standard (DES) is a cryptographic block cipher algorithm.
RSA is a common public key algorithm, which can be used for encryption and signature
"Des code is 8 times larger than rsa"
from question "How can I translate printf("%c",M); from C to Java for my DES implementation?"
"By comparison des see section 3.2 and other block ciphers are much faster than the rsa algorithm"
from question "Big-O Notation: Encryption Algorithms"