The minimum information necessary on a digital certificate is:

A.
Name, public key, digital signature of the certifier

B.
Name, expiration date, public key

C.
Name, expiration date, digital signature of the certifier

D.
Name, serial number, private key

Explanation:
The correct answer is “Name, public key, digital signature of the certifier”, where the name of the
individual is certified and bound to his/her public key. This certification is validated by the digital
signature of the certifying agent. In answer a, the public key is
not present to be bound to the person’s name.
* In answer “Name, public key, digital signature of the certifier” the public
key and name are present, but there is no digital signature verifying
that the public key belongs to the name.
* Answer “Name, serial number, private key” is incorrect on a number of counts. First, the private
key is never disclosed to the public and secondly, there is no digital signature.