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Web Security Best Practices

Essential security best practices for modern web applications.

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Web Security Best Practices


Following security best practices helps protect your application and users from common threats.


Transport Security


  • **Always use HTTPS**: Encrypt all data in transit
  • **Implement HSTS**: Force HTTPS connections
  • **Use strong TLS versions**: TLS 1.2 minimum, TLS 1.3 preferred
  • **Configure secure cipher suites**: Avoid weak ciphers

  • Application Security


  • **Implement CSP**: Content Security Policy prevents XSS
  • **Validate all input**: Never trust user input
  • **Use parameterized queries**: Prevent SQL injection
  • **Sanitize output**: Escape user-generated content

  • Authentication & Authorization


  • **Use strong passwords**: Enforce complexity requirements
  • **Implement rate limiting**: Prevent brute force attacks
  • **Use secure session management**: Proper session handling
  • **Implement 2FA**: Two-factor authentication

  • Data Protection


  • **Encrypt sensitive data**: At rest and in transit
  • **Use secure cookies**: HttpOnly, Secure, SameSite
  • **Minimize data collection**: Collect only what you need
  • **Implement data retention policies**: Delete old data

  • Monitoring & Response


  • **Log security events**: Monitor for suspicious activity
  • **Set up alerts**: Get notified of issues
  • **Have an incident response plan**: Know what to do
  • **Regular security audits**: Review and improve

  • Compliance


  • **Follow OWASP Top 10**: Common vulnerabilities
  • **Consider GDPR**: Data privacy regulations
  • **Implement security.txt**: Security contact information
  • **Regular penetration testing**: Find vulnerabilities

  • Tools & Resources


  • Security scanning tools
  • Dependency vulnerability scanners
  • Security headers analyzers
  • SSL/TLS configuration testers
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