**What technology is often used for biometric authentication based on unique physical traits?**
Biometric recognition technology is often used for authentication based on unique physical traits. This technology analyzes characteristics such as fingerprints, facial recognition, iris patterns, and voice recognition to verify an individual’s identity. Systems using biometrics are generally more secure than traditional password-based methods, as they rely on unique biological features that are difficult to replicate. This technology is widely applied in various sectors, including banking, mobile devices, and secure access control systems.