Which of the following ensures confidentiality of information sent over the internet?
A.
Digital signature
B.
Digital certificate
C.
Online Certificate Status Protocol
D.
Private key cryptosystem
Explanation:
Confidentiality is assured by a private key cryptosystem. Digital signatures assure data integrity,
authentication and nonrepudiation, but not confidentially. A digital certificate is a certificate that
uses a digital signature to bind together a public key with an identity; therefore, it does not address
confidentiality. Online Certificate Status Protocol (OCSP) is an Internet protocol used for obtaining
the revocation status of a digital certificate.