When a message sent by a user is digitally signed with a private key,the person will not be able to deny sending the message.This application of encryption is an example of
A)Authentication
B)Nonrepudiation
C)Confidentiality
D)Auditing

Question

Quizplus · Accepted Answer

Nonrepudiation refers to the ability to prevent a user from denying that they sent a message. When a message is digitally signed with a private key, it can be verified using the corresponding public key, proving that the sender indeed sent the message. Therefore, digital signatures provide a mechanism for nonrepudiation.

When a Message Sent by a User Is Digitally Signed