Secure Coding

Learning Objectives

• Apply security-by-default coding habits.
• Reduce common vulnerabilities in routine development.
• Build review checklists for secure implementation.

Core Principles

• Validate all untrusted input.
• Use least privilege for services and DB users.
• Keep secrets out of source code.
• Use parameterized queries.
• Log security-relevant events safely.

Quick Review Checklist

• Input validation present?
• Auth and authorization enforced?
• Secrets protected?
• Error handling non-leaky?
• Sensitive operations audited?

Summary

Secure coding is a continuous practice, not a one-time task.