Security Best Practices

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Authentication & Authorization

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API Key Management

• Rotate API keys regularly (recommended: every 90 days)
• Never expose API keys in client-side code
• Use environment variables for API key storage
• Implement proper key revocation procedures
• Monitor API key usage patterns

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Access Control

// Example: Implementing role-based access control
const checkPermission = async (user: User, resource: string, action: string) => {
  const permission = await getPermission(user.id, resource);
  return permission.can(action);
};

• Implement role-based access control (RBAC)
• Use the principle of least privilege
• Regular access audits
• Implement session management
• Enable multi-factor authentication

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Data Security

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Encryption

• Use TLS 1.3 for data in transit
• Implement at-rest encryption for sensitive data
• Use strong encryption algorithms
• Proper key management
• Regular encryption audit

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Data Privacy

// Example: Implementing data masking
const maskSensitiveData = (data: string): string => {
  return data.replace(/\d(?=\d{4})/g, '*');
};

• Implement data masking for sensitive information
• Follow data retention policies
• Regular privacy impact assessments
• Implement data anonymization
• Proper data disposal procedures

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Network Security

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API Security

• Use rate limiting
• Implement request validation
• Enable CORS properly
• Use API gateways
• Monitor for suspicious activity

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Firewall Configuration

# Example: Basic firewall rules
rules:
  - port: 443
    protocol: tcp
    allow: true
  - port: 80
    protocol: tcp
    redirect_to: 443

• Configure proper firewall rules
• Use WAF (Web Application Firewall)
• Regular security scans
• Monitor network traffic
• Implement DDoS protection

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Monitoring & Auditing

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Security Monitoring

// Example: Security event logging
const logSecurityEvent = async (event: SecurityEvent) => {
  await logger.log({
    level: 'security',
    timestamp: new Date(),
    event: event,
    user: event.user,
    action: event.action,
    resource: event.resource
  });
};

• Implement comprehensive logging
• Set up security alerts
• Regular security audits
• Monitor user activity
• Track API usage patterns

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Incident Response

• Document incident response procedures
• Regular security drills
• Maintain incident logs
• Define escalation paths
• Post-incident analysis

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Compliance

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Regulatory Compliance

• GDPR compliance
• CCPA compliance
• SOC 2 compliance
• HIPAA compliance (if applicable)
• Regular compliance audits

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Security Standards

# Example: Security headers configuration
security_headers:
  Strict-Transport-Security: max-age=31536000
  Content-Security-Policy: default-src 'self'
  X-Frame-Options: DENY
  X-Content-Type-Options: nosniff

• Follow OWASP guidelines
• Implement security headers
• Regular security assessments
• Maintain security documentation
• Employee security training

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Development Security

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Secure Coding

// Example: Input validation
const validateInput = (input: string): boolean => {
  return /^[a-zA-Z0-9\s-_]+$/.test(input);
};

• Input validation
• Output encoding
• Secure dependency management
• Code review processes
• Security testing

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Dependency Management

• Regular dependency updates
• Vulnerability scanning
• Lock file maintenance
• Dependency audit
• Version control

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Best Practices Checklist

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Next Steps

1. Review your current security implementation
2. Implement missing security measures
3. Set up regular security audits
4. Train team on security best practices
5. Monitor and improve security measures