1. Traditional authentication methods involved simple passwords like names and numbers that were easy for users to remember but provided little security. 2. Modern authentication has become more complex, utilizing strong passwords with special characters, numbers, case sensitivity and languages only hackers understand. 3. The new trend is multi-factor authentication using biometric devices like retina scanners alongside passwords. Time-based authentication, where passwords are entered at specific timed intervals, provides an additional layer of security compared to passwords alone.