1. A multi-layered security process requiring multiple verification methods or steps to confirm a user's identity
The bank implemented complex authentication to protect customer accounts from unauthorized access.
O banco implementou autenticação complexa para proteger contas de clientes contra acesso não autorizado.
2. An advanced authentication system that combines various factors such as passwords, biometrics, and security tokens
Complex authentication methods include two-factor authentication and biometric verification.
Os métodos de autenticação complexa incluem autenticação de dois fatores e verificação biométrica.