Which of the following are techniques used by symmetric encryption cryptography?

Which of the following are techniques used by symmetric encryption cryptography? (Choose all that apply.)

Which of the following are techniques used by symmetric encryption cryptography? (Choose all that apply.)

A.
Block ciphers

B.
Message Authentication Codes (MAC)

C.
One-time pad

D.
Stream ciphers

E.
Vigen�re cipher



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seenagape

seenagape

Correct answer is ABD

Veg

Veg

Well if Vigenère cipher is a symmetric cryptosystem then One time pad should also be as it is a type of Vigenère cipher but then that would mean all are the correct answers which i dont think is the correct solution to the problem.

I am confused though. So i do not know what is the correct solution to this problem is. If i find it i will update it here