Key Takeaways

1. Secure development starts with secure design - You can't add security after the fact

2. Input validation is your first defense - Never trust any input from any source

3. Use proven cryptography correctly - Don't roll your own crypto

4. Third-party components are your responsibility - Monitor and manage them actively

5. SBOM is required and valuable - It's not just compliance, it's good practice

6. Layer your security testing - Different tests find different vulnerabilities

7. Automate security where possible - But don't rely solely on tools

8. Document security decisions - Future you will thank present you

9. Build environment security matters - A compromised build affects every device

10. Security is never "done" - Plan for ongoing monitoring and updates

Remember: Every line of code you write, every component you choose, and every test you run is an opportunity to make your device more secure. The practices in this chapter aren't just about meeting FDA requirements - they're about building devices that protect patients throughout their operational life.

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Next Chapter: Post-Market Responsibilities - Maintaining security throughout your device's operational life