Quantum Hangover: Why Everybody whois anybody will need a PQC Playbook (ETA, circa 2030) 🤡

Quantum Hangover: Why Everybody whois anybody will need a PQC Playbook (ETA, circa 2030) 🤡

Quantum risk isn’t about tomorrow’s technology. It’s about yesterday’s secrets. 🙈 🙉 🙊

Every email, backup, legal file and classified chat you encrypt today might already be sitting in a foreign data centre labelled “decrypt later.”

That’s the quiet strategy called Harvest-Now, Decrypt-Later — and it’s already in play.

Post-Quantum Cryptography (PQC) is the only credible countermeasure, but it’s also the least sexy topic in cyber. It doesn’t sparkle like AI or buzz like zero-trust. It’s plumbing. But bad plumbing leaks.

Over the next few days I’ll unpack a full PQC Playbook — not the vendor-brochure version, but the one written for architects, engineers, and CISOs who know how ugly crypto migrations get in real life.

Because when the first large-scale quantum computer arrives, it won’t hack you — it’ll time-travel your data back into plaintext.

Below is the long-form version I’ve published on Substack — diagrams, risks, metrics, and field notes from the cryptographic trenches.

https://lnkd.in/eD-G74WR

Substack Summary

We are living through the last decade in which RSA and ECC will protect anything of long-term value.

Shor’s algorithm broke the mathematics years ago; all we’re waiting for is the hardware to catch up.

Meanwhile, adversaries are stockpiling encrypted traffic like wine — confident it will age into plaintext.

This playbook is not theoretical. It’s the operational guide for how to survive the quantum hangover: inventory, triage, hybridisation, re-encryption, and continuous assurance.

It’s written for the people who get called after the board meeting, when someone finally asks,

“Can someone explain what a lattice is and why we suddenly have to care?”