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Security Features

🔐 Authentication Security

JWT (JSON Web Tokens)

  • Algorithm: HMAC-SHA256 for signing
  • Token Structure: Header.Payload.Signature
  • Access Token: 15 minutes expiration
  • Refresh Token: 7 days expiration with rotation
  • Claims: User ID, roles, expiration, issuer

Password Security

  • Hashing: BCrypt with salt rounds (10)
  • Requirements:
    • Minimum 8 characters
    • Uppercase and lowercase letters
    • Numbers and special characters
  • Validation: Real-time password strength checking

Multi-Factor Authentication (MFA)

  • TOTP: Time-based One-Time Password (RFC 6238)
  • Algorithm: SHA1 with 6-digit codes
  • Period: 30-second intervals
  • Backup Codes: 10 single-use recovery codes
  • QR Code: Standard otpauth:// format

🛡️ API Security

CORS Configuration

  • Origins: Configurable allowed origins
  • Methods: GET, POST, PUT, DELETE, OPTIONS
  • Headers: Authorization, Content-Type
  • Credentials: Supported for authenticated requests

Rate Limiting

  • Login Attempts: 5 attempts per 15 minutes
  • Password Reset: 3 requests per hour
  • Email Verification: 5 requests per hour
  • Token Refresh: 10 requests per minute

Input Validation

  • Email: RFC 5322 compliant validation
  • Username: 3-50 characters, alphanumeric
  • Password: Strength requirements enforced
  • Tokens: UUID format validation

🔒 Data Protection

Token Management

  • Secure Storage: Database with encryption
  • Revocation: Immediate token invalidation
  • Rotation: Automatic refresh token rotation
  • Cleanup: Expired token removal

Email Security

  • Verification: Required for account activation
  • Token Expiration: 1-hour validity
  • Secure Links: HTTPS verification URLs
  • Rate Limiting: Prevent email abuse

Session Security

  • Stateless: No server-side sessions
  • Token-Based: JWT for authentication
  • Automatic Expiration: Configurable timeouts
  • Secure Logout: Token revocation

🚫 Attack Prevention

Brute Force Protection

  • Account Lockout: Temporary after failed attempts
  • Progressive Delays: Increasing wait times
  • IP Tracking: Monitor suspicious activity
  • Rate Limiting: Prevent rapid requests

Token Security

  • Secure Generation: Cryptographically random
  • Short Lifespan: Limited token validity
  • HTTPS Only: Secure transmission
  • HttpOnly Cookies: XSS protection

SQL Injection Prevention

  • JPA/Hibernate: Parameterized queries
  • Input Sanitization: Validation and escaping
  • Prepared Statements: Automatic protection
  • ORM Mapping: Type-safe queries

📧 Email Security

SMTP Configuration

  • TLS/SSL: Encrypted email transmission
  • Authentication: Secure SMTP credentials
  • Rate Limiting: Prevent email abuse
  • Template Security: No sensitive data in templates

Verification Process

  • Unique Tokens: UUID-based verification
  • Time-Limited: 1-hour expiration
  • One-Time Use: Tokens invalidated after use
  • Secure Links: HTTPS verification URLs

🔐 MFA Security

TOTP Implementation

  • Secret Generation: Cryptographically secure
  • QR Code: Standard format for authenticator apps
  • Time Synchronization: 30-second tolerance
  • Backup Codes: Secure generation and storage

Recovery Process

  • Backup Codes: 10 single-use codes
  • Secure Storage: Encrypted in database
  • Usage Tracking: Monitor code usage
  • Regeneration: Secure code replacement

🛡️ OAuth2 Security

Provider Integration

  • State Parameter: CSRF protection
  • Secure Callbacks: HTTPS redirect URIs
  • Token Validation: Verify provider tokens
  • Account Linking: Secure provider association

Authorization Flow

  • PKCE: Proof Key for Code Exchange
  • Secure Storage: Encrypted token storage
  • Scope Validation: Limited permissions
  • Token Refresh: Secure renewal process

📊 Security Monitoring

Audit Logging

  • Authentication Events: Login, logout, failures
  • Security Incidents: Failed attempts, suspicious activity
  • Token Operations: Creation, refresh, revocation
  • User Actions: Profile changes, password updates

Error Handling

  • Generic Messages: No sensitive information leakage
  • Logging: Detailed error logs for debugging
  • Rate Limiting: Prevent error enumeration
  • Graceful Degradation: Maintain service availability

🔧 Security Configuration

Environment Variables

# Required
JWT_SECRET=your-super-secret-jwt-key-that-should-be-at-least-256-bits-long

# Optional
MAIL_USERNAME=your-email@gmail.com
MAIL_PASSWORD=your-app-password
GOOGLE_CLIENT_ID=your-google-client-id
GOOGLE_CLIENT_SECRET=your-google-client-secret

Application Properties

# JWT Configuration
jwt:
  secret: ${JWT_SECRET}
  access-token-validity: 900  # 15 minutes
  refresh-token-validity: 604800  # 7 days

# Security Configuration
app:
  auth:
    password:
      min-length: 8
      require-uppercase: true
      require-lowercase: true
      require-numbers: true
      require-special-chars: true

🚨 Security Best Practices

Development

  1. Never commit secrets to version control
  2. Use environment variables for sensitive data
  3. Validate all inputs thoroughly
  4. Implement proper error handling
  5. Use HTTPS in production

Deployment

  1. Secure database with proper access controls
  2. Enable HTTPS with valid certificates
  3. Configure firewalls and network security
  4. Monitor logs for security events
  5. Regular updates of dependencies

Maintenance

  1. Rotate secrets regularly
  2. Monitor security advisories
  3. Update dependencies promptly
  4. Backup data securely
  5. Test security measures regularly