What do you want to “know" to prove yourself that it was Bob who had send a mail?

Bob, your senior colleague, has sent you a mail regarding a a deal with one of the clients. You are requested to accept the offer and you oblige.

After 2 days, Bob denies that he had ever sent a mail.

What do you want to “know" to prove yourself that it was Bob who had send a mail?
A . Confidentiality
B . Integrity
C . Non-Repudiation
D . Authentication

View Answer

Answer: C