The technology used for authenticating users through mobile devices commonly involves biometric authentication and two-factor authentication (2FA). Biometric systems utilize unique physical characteristics such as fingerprints, facial recognition, or iris scans to verify user identity. Additionally, 2FA enhances security by requiring users to provide two different types of verification, often combining something they know (like a password) with something they have (like a smartphone app that generates a code). These technologies help protect sensitive information and reduce unauthorized access to accounts.