17.The primary purpose of a digital certificate is to prove the ownership of a_________
(A)
public key
(B) private key
(C) secret key
(D) security level
(E) signature.
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統計: A(1), B(0), C(0), D(0), E(0) #2788330
統計: A(1), B(0), C(0), D(0), E(0) #2788330