Which of the following is a characteristic of Public Key Infrastructure (PKI)?

Which of the following is a characteristic of Public Key Infrastructure (PKI)?

A.
Public-key cryptosystems are faster than symmetric-key cryptosystems.

B.
Public-key cryptosystems distribute public-keys within digital signatures.

C.
Public-key cryptosystems do not require a secure key distribution channel.

D.
Public-key cryptosystems do not provide technical non-repudiation via digital signatures.