Which Security Service says that if two parties are authenti

Which Security Service says that, if two parties are authenticated to a transaction, neither can deny after the fact that the transaction has taken place?

A:Confidentiality

B:Access control

C:Authentication

D:Non-repudiation

Solution

Answer:

D:Non-repudiation , It is the ability to make sure that a sender cannot refuse for not sending the message , so Non-repudiation says no party can deny after the transaction has taken out.