Learn the core principles of authentication and authorization in web applications.

• Authentication vs Authorization
• Security principles
• Common vulnerabilities
• Identity management
• Multi-factor authentication
• Security best practices
• Threat modeling
• OWASP guidelines

Implement secure password handling with hashing and validation.

• Password hashing algorithms
• Salt and bcrypt
• Password strength validation
• Password reset flows
• Brute force protection
• Rate limiting
• Account lockout policies
• Secure password storage

Master server-side sessions, cookies, and session security.

• Session concepts
• Cookie-based sessions
• Session storage options
• Session lifecycle
• Session security
• Cross-site scripting protection
• Session hijacking prevention
• Secure cookie attributes

Implement stateless authentication using JSON Web Tokens.

• JWT structure and format
• Token creation and signing
• Token verification
• Claims and payload
• Access vs refresh tokens
• Token expiration handling
• JWT security considerations
• Token storage strategies

Integrate third-party authentication using OAuth 2.0 and OpenID Connect.

• OAuth 2.0 flows
• Authorization code flow
• Client credentials flow
• OpenID Connect basics
• Social login integration
• Google/Facebook OAuth
• Scope and permissions
• Provider configuration

Secure REST APIs with various authentication methods.

• API key authentication
• Bearer token authentication
• Basic authentication
• API rate limiting
• CORS configuration
• Request signing
• API versioning security
• Documentation and testing

Implement authorization with roles, permissions, and access control.

• RBAC concepts
• User roles and permissions
• Resource-based access
• Hierarchical permissions
• Dynamic authorization
• Middleware implementation
• Database design for RBAC
• Admin panel integration

Add extra security layers with multi-factor authentication systems.

• MFA concepts and types
• TOTP (Time-based OTP)
• SMS verification
• Email verification
• Authenticator apps
• Backup codes
• Biometric authentication
• Recovery mechanisms

Implement security headers and HTTPS for secure communication.

• HTTPS implementation
• SSL/TLS certificates
• Security headers overview
• HSTS (HTTP Strict Transport Security)
• Content Security Policy
• X-Frame-Options
• X-Content-Type-Options
• Security scanning tools

Secure user data storage and prevent database vulnerabilities.

• SQL injection prevention
• Parameterized queries
• Database encryption
• User data protection
• GDPR compliance
• Data anonymization
• Audit logging
• Backup security

Test authentication systems and identify security vulnerabilities.

• Security testing principles
• Penetration testing basics
• Vulnerability scanning
• Authentication testing
• Authorization testing
• Session management testing
• Security automation
• Bug bounty preparation

Implement advanced security patterns and monitoring systems.

• Zero-trust architecture
• Microservices security
• API gateways
• Security monitoring
• Incident response
• Threat detection
• Security metrics
• Compliance frameworks