authentication
n. uncountablen. the process of proving who you are, usually by entering a password or using a fingerprint. In computing, this also refers to the process of verifying that a piece of data, a message, or a website is genuine and has not been changed.
n. the verification of a user's identity, typically through credentials such as passwords or biometric data. In computing and cybersecurity, authentication refers to verifying the integrity and origin of data or hardware to ensure it is legitimate and hasn't been tampered with.
The app requires authentication before you can log in.
Two-factor authentication adds an extra layer of security to your online accounts.
Modern systems rely on multi-layered authentication protocols to ensure that only authorized personnel can access sensitive financial data.
From authenticate + -ation.