How to Verify a File Checksum (SHA-256) on Windows, Mac and Linux
Check a download's SHA-256 hash with Get-FileHash or certutil on Windows, shasum on Mac and sha256sum on Linux, plus GPG basics and what a mismatch means.
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.