Who vouches for the binding between the data items in a digital certificate?

A.
Registration authority

B.
Certification authority

C.
Issuing authority

D.
Vouching authority

Explanation:
A certification authority issues digital certificates that include a public key and the identity of the owner. The
matching private key is not publicly available, but kept secret by the end user who created the key pair. The
certificate is also a confirmation or validation by the CA that the public key contained in the certificate belongs to
the person, organization, server or other entity noted in the certificate. A certification authority’s duty in such
schemes is to verify an applicant’s credentials, so that users and relying parties are able to trust the information
in the CA’s certificates.
Incorrect Answers:
A: A registration authority (RA) confirms user requests for a digital certificate and informs the certificate
authority (CA) to distribute it.
C: An issuing authority does not vouch for the binding between the data items in a digital certificate.
D: A vouching authority does not vouch for the binding between the data items in a digital certificate.

https://en.wikipedia.org/wiki/Certificate_authority
http://searchsecurity.techtarget.com/definition/registration-authority