Security Best Practices for Developers

🔒 Protecting your application's security is critical. Here are essential guidelines:

1. Input Validation

• Always sanitize user inputs to prevent injection attacks.
• Use whitelists for data validation (e.g., ^[a-zA-Z0-9_]+$ for safe strings).
• 🛡️ Example:

  if not re.match(r'^[a-zA-Z0-9_]+$', user_input):
      raise ValueError("Invalid input")
  

2. Secure Authentication

• Implement OAuth 2.0 or OpenID Connect for third-party logins.
• 🔐 Use HTTPS for all authentication endpoints.
• Store passwords with bcrypt or Argon2 hashing.

3. Data Encryption

• 🔒 Encrypt sensitive data at rest (AES-256) and in transit (TLS 1.3+).
• Use AES_256 for encryption keys.
• 🧠 Example:

  const encrypted = CryptoJS.AES.encrypt("secret", "password").toString();
  

4. Security Headers

• Set Content-Security-Policy to restrict resource loading.
• Enable X-Content-Type-Options: nosniff to prevent MIME type sniffing.
• 📌 Refer to our Secure Coding Practices Guide for more details.

5. Dependency Management

• Regularly update libraries to fix vulnerabilities.
• Use tools like OWASP_DEPENDENCIES_CHECKER to audit dependencies.
• 🧪 Example:

  npm audit
  

6. Principle of Least Privilege

• Restrict user permissions to minimal required access.
• Use ROLE_VIEWER or ROLE_ADMIN for granular control.

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For advanced security configurations, check our [Security Configuration Reference](/en/docs/developer/guides/security_configuration).