Which of the following are the disadvantages of symmetric encryption?

A.
Symmetric encryption can be cracked through a “brute-force” attack

B.
Symmetric encryption also create lesser key-management problems than Asymmetric ciphers

C.
Secret channel is necessary for the exchange of the public key

D.
Symmetric encryption processing tend to be about “1000 times slower than Asymmetric encryption

E.
The key that deciphers the ciphertext is the same as the key enciphers the clear text