Secure Web Application Development: A: Hands-on ...

Never hardcode API keys. Use environment variables or vaults (HashiCorp, AWS Secrets Manager). 5. Defense in Depth: The Browser as a Shield

Treat every input (URL, Header, JSON body) as malicious.

Implementing a server-side check that validates the ownership of the record against the session token before returning data. 4. Hardening the Pipeline (DevSecOps) Security isn't a one-time event; it’s a lifestyle. Secure Web Application Development: A Hands-On ...

Using HttpOnly , Secure , and SameSite flags to prevent session hijacking. 6. Real-World Checklist for Your Next Sprint

80% of your code is actually someone else's (npm/pip/NuGet packages). Track and patch vulnerable dependencies automatically. Never hardcode API keys

Design your application as if an attacker is already inside your network. 2. The Foundation: OWASP Top 10 Mastery

Identifying a bug during coding costs $100; identifying it after a breach costs millions. Defense in Depth: The Browser as a Shield

Moving from "Is this user logged in?" to "Does this user have permission for this specific resource ID?"