Which of the following is a proper description of DES?

A.
DES encryption employs an asymmetric key using a stream cipher and 56 bits for encryption.

B.
DES encryption employs a symmetric key using a block cipher and 56 bits for encryption.

C.
DES encryption employs a block cipher using 128 bits for encryption.

D.
DES encryption employs a block cipher using a true key length of 64 bits for encryption.

Explanation:
DES is a symmetric encryption that employs 64 bits for encryption but
uses 8 bits for parity. Thus, only 56 bits are used for the actual encryption
process.