# Secure Coding Practices

> Master foundational secure coding principles to prevent common vulnerabilities like injection, XSS, and insecure defaults at the source code level.

Canonical: https://codelivly.com/rooms/secure-coding-practices
Last updated: 2026-10-28

| | |
|---|---|
| Level | Intermediate |
| Category | Cybersecurity |
| Lessons | 5 |
| Estimated time | 30 min |
| XP | 100 |

This module transitions you from architectural threat modeling to the tactical execution of secure software development. You will learn the core principles of secure coding, including input validation, output encoding, secure defaults, and memory safety. We will explore how common vulnerabilities (like those in the OWASP Top 10) manifest in code and how to write resilient, defensive code to prevent them. The module culminates in a hands-on guided lab where you will review and remediate vulnerable code snippets, applying secure coding best practices to build a robust application feature.

## Lessons

1. What Is Secure Coding and Why Does It Matter (30 min)
2. Input Validation and Output Encoding (30 min)
3. Authentication and Session Handling Patterns (30 min)
4. Safe Error Handling and Logging (30 min)
5. Guided Lab: Fixing Vulnerable Code Samples (30 min)

## Related

- [Learning path: Secure SDLC and Threat Modeling](https://codelivly.com/learning-paths/secure-sdlc-and-threat-modeling)
- [All rooms](https://codelivly.com/rooms)