uwierzytelnienie in inglese:

Many cloud companies now offer an added layer of security called 'two-factor authentication', where users have to enter a code sent to their mobile phone as well as a password to get into their accounts.

authentication- that's confirmation that someone is who they say they are. And the company actually uses two steps to do this.

At the end of my job contract I will ask for a certification.

When the articles of incorporation are complete it is essential to go to the notary public's office to undertake certification of the articles drawn up.