What is a trusted third party from which a public key can be reliably obtained?

What is a trusted third party from which a public key can be reliably obtained?

A.
Key repository

B.
Certificate authority

C.
Key store

D.
Certificate database

Explanation:

: A certificate Authority, or CA, is a trusted third party from whom a public key can be obtained
reliably, even via the Internet. The CA certifies a public key by generating a certificate. A digital
signature acts as a proof of the sender’s identity. The certificates security is based on: the access

difficulty of the physical machine that stores the certificate and the secrecy of the access
password. See Page 8.1 of CCSE NG Official Courseware. (VPN1-FW1 Management II NG FP-1).