What is meant by non$-$repudiation? $($D$1,$ L$1\mathrm{.}1)$

If a user does something $($e$.$g$.,$ sends an email$),$ they can't later claim that they were not the sender$.$

Controls to protect the organization's reputation from harm due to inappropriate social media postings by employees, even if on their private accounts and personal time.

It is part of the rules used in RuBAC to prevent unauthorized write$-$up$.$

It is a security feature that prevents session replay attacks.