Security is not an afterthought — it is a fundamental requirement of every web application. The OWASP Top 10 represents the most critical security risks to web applications and provides a framework for building more secure software.
1. Broken Access Control
Access control failures are the most common security issue. Implement proper authorization checks on every endpoint and follow the principle of least privilege.
2. Cryptographic Failures
Protect sensitive data with strong encryption. Use bcrypt or Argon2 for password hashing, TLS 1.3 for data in transit, and AES-256 for data at rest.
3. Injection Attacks
SQL injection, command injection, and XSS remain persistent threats. Always use parameterized queries, validate input, and encode output.
4. Insecure Design
Security must be integrated into the design phase. Threat modeling, security requirements, and secure design patterns are essential from day one.
5. CSRF Protection
Cross-Site Request Forgery attacks can be prevented with synchronizer tokens, same-site cookies, and proper origin validation.
Building secure applications requires a security-first mindset throughout the entire development lifecycle, from requirements gathering to deployment and maintenance.