What can be defined as a digital certificate that binds a set of descriptive data items, other than a public key,
either directly to a subject name or to the identifier of another certificate that is a public-key certificate?

A.
A public-key certificate

B.
An attribute certificate

C.
A digital certificate

D.
A descriptive certificate

Explanation:
The US American National Standards Institute (ANSI) X9 committee developed the concept of attribute
certificate as a data structure that binds some attributes values with the identification information about its
holder.
According to RFC 2828 [24], an attribute certificate is “a digital certificate that binds a set of descriptive data
items, other than a public key, either directly to a subject name or to the identifier of another certificate that is a
public-key certificate.
One of the advantages of attribute certificate is that it can be used for various other purposes. It may contain
group membership, role clearance, or any other form of authorization.Incorrect Answers:
A: An attribute certificate can be used to supplement a public-key certificate by storing additional information or
attributes. However, an attribute certificate, not a public-key certificate is what is described in the question.
C: A digital certificate is another name for a public key certificate. It is an electronic document used to prove
ownership of a public key. This is not what is described in the question.
D: A descriptive certificate is not a defined certificate type.