Shift Left: Security Starts Early

Shift Left: Security Starts Early

"Shift left" means moving security earlier in the development process.

Why? Because fixing a security bug costs exponentially more depending on when you find it:

• Found during code review: Easy fix, 1 hour, $100
• Found during testing: Need to retest, 4 hours, $400
• Found in production: Incident response, forensics, notification, lawsuits, $1M+

Traditional Approach (Security at the End)

Code → Build → Test → Deploy → Security Review → OOPS, vulnerabilities found → Patch → Redeploy

Security is an afterthought. Vulnerabilities are found when users are already affected.

DevSecOps Approach (Shift Left)

Code Review → Automated Checks → Dependency Scan → Build → Test → Security Testing → Deploy → Monitor

Security is baked in throughout development.

What "Shift Left" Means for You

As a Developer:

• Learn basic secure coding
• Run security tools locally before committing
• Review security findings in code review
• Fix issues before they reach main branch

As DevOps:

• Automate security scanning in the pipeline
• Enforce policies
• Scan container images
• Monitor running systems

As QA:

• Security testing is part of QA
• Test for common vulnerabilities

The Three Pillars of DevSecOps

1. Secure Development Practices - Developers write secure code from the start
2. Automated Security Checks - Tools find problems before humans do
3. Continuous Monitoring - Systems are watched for anomalies