Which three statements are true about DES? (Choose three.)
A. A 56-bit key is used to encrypt 56-bit blocks of plaintext.
B. A 56-bit key is used to encrypt 64-bit blocks of plaintext.
C. Each block of plaintext is processed through 16 rounds of identical operations.
D. Each block of plaintext is processed through 64 rounds of identical operations.
E. ECB, CBC, and CBF are modes of DES.
F. Each Block of plaintext is processed through 8 rounds of identical operations.
G. CTR, CBC, and OFB are modes of DES.
