authentication
n. uncountable B2 Upper Intermediate US //ɔˌθɛntəˈkeɪʃən// UK //ɔːθˌɛntɪkˈeɪʃən// au·then·ti·ca·tion
n. the process of proving who you are, usually by entering a password or using a fingerprint.
n. the verification of a user's identity, typically through credentials such as passwords or biometric data.
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.