Which of the following characteristics are part of the DES encryption scheme?

A.
A secret key encryption algorithm and a symmetric key distribution system

B.
A secret key encryption algorithm and an asymmetric key distribution

C.
A public key encryption algorithm and a symmetric key distribution system

D.
A public key encryption algorithm and an asymmetric key distribution system

Explanation:
DES is a symmetric key system. The DES cryptosystem can be called
either a symmetric key system or a secret key system.