An encrypted message is sent using PKI from Sara, a client, to a customer. Sara claims she never sent the
message. Which of the following aspects of PKI BEST ensures the identity of the sender?
A.
CRL
B.
Non-repudiation
C.
Trust models
D.
Recovery agents
Explanation:
Nonrepudiation prevents one party from denying actions they carried out. This means that the identity of
the email sender will not be repudiated.
Incorrect Answers:
A: CRLs are literally a list of certificates that a specific CA stated should no longer be used.
C: Trust models are used with PKIs. It is not used to ensure the identity of the email sender.
D: Recovery Agents are used with certificates.Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 262, 414