Every TLS handshake and every SSH login on the internet today relies on math that a large enough quantum computer could eventually break. That is not a hypothetical for security teams anymore. The National Institute of Standards and Technology finalized its first three post-quantum cryptography standards on August 13, 2024, and the tooling needed to actually deploy them, OpenSSL 3’s provider architecture, the Open Quantum Safe project’s liboqs library, and hybrid key exchange in OpenSSH, has matured enough for production use in 2026. This tutorial walks through a full PQC migration on a real Ubuntu 24.04 server: building the software, generating quantum-safe keys, standing up a hybrid TLS-terminating NGINX proxy, hardening OpenSSH, and verifying every handshake actually negotiates the new algorithms instead of quietly falling back to RSA. By the end you will have a working reverse-proxy stack that speaks both classical and post-quantum cryptography at once, plus the troubleshooting knowledge to fix the handshake failures and build errors that trip up almost everyone on their first attempt. Canadian IT teams have extra reason to move now: the Government of Canada introduced Level 1 of the Canadian Program for Cyber Security Certification in April 2026, and while it does not yet mandate post-quantum algorithms specifically, it signals the direction federal contractors are being pushed. Getting comfortable with PQC before it is contractually required beats scrambling after the fact. This is a hands-on companion to the broader cybersecurity coverage on this site. If you have already hardened your perimeter with an IDS, a SIEM, or a secrets manager, post-quantum cryptography is the next layer down the stack: it protects the actual key exchange and signatures underneath everything else you have built. Don't miss new tech stories on Google Add Tech Insider once in the Google app and our stories appear in