authentication

noun
1
the act of proving that something is real, true or what somebody claims it is
احراز هویت, اصالت‌سنجی, راستی آزمایی
2
the act of proving that somebody is a particular person
تایید هویت, احراز هویت, اثبات هویت
User authentication is often performed with passwords.
see also multi-factor authentication