You may have seen headlines that quantum computers are going to "break all encryption." It sounds like the kind of thing you should panic about, or at least buy something to fix. The honest version is calmer and more useful: there is a real shift happening underneath the internet, most of it is being handled by people you will never meet, and your job as a regular website owner is small but worth understanding. Here it is without the hype.
What is the actual worry?
Almost everything private on the internet - the padlock on your site, your logins, your payments - is protected by encryption that relies on a particular kind of maths being too hard for normal computers to undo. It would take them millions of years. That is the whole trick.
A large enough quantum computer works differently, and could undo some of that maths in a reasonable amount of time. Powerful quantum computers do not really exist yet - the ones today are small and experimental. But the expectation is that they will, eventually, and when they do, today's protection would no longer hold against them.
Why it matters now, if the computers are not here yet
Because of one uncomfortable idea: "harvest now, decrypt later." Someone could record encrypted traffic today - your data, scrambled and unreadable - and simply store it, waiting for a future quantum computer to unscramble it. For anything that needs to stay secret for ten or twenty years (medical records, legal documents, state secrets, some financial data), the clock is effectively already ticking.
For most everyday websites, the data you send is not sensitive a decade from now. But the internet's plumbing has to be ready regardless, and that upgrade is happening now.
The good news: this is mostly being handled for you
The world saw this coming. In 2024, the US standards body NIST finalised a new set of "quantum-resistant" encryption methods - maths designed to be hard even for quantum computers. Since then, the big players have been quietly switching them on:
- Modern browsers like Chrome already use quantum-safe encryption for many connections.
- Major infrastructure providers - the companies that run large chunks of the web, like Cloudflare and the big clouds - have rolled it out too.
This is the part that should lower your blood pressure: a lot of your traffic is probably already protected against the harvest-now-decrypt-later problem, and you did nothing to make that happen.
What you should actually do
Short version: not much, and nothing in a panic.
- Keep your software and servers updated. The protection arrives through normal updates to browsers, web servers, and operating systems. Falling years behind on updates is the real risk, not quantum computers.
- Lean on modern providers. If your site sits behind a current CDN or reputable host, you inherit their migration for free. This is one more reason not to run ancient, unmaintained infrastructure.
- Be sceptical of "quantum-proof" sales pitches. If a vendor is pressuring you to buy a special product right now to survive the quantum apocalypse, be wary. The serious work is happening in open standards, not in a panic upsell.
One thing on the horizon: certificates
The certificates that prove your site is really your site are part of this system too, and they will eventually need to change to stay quantum-safe. The challenge is that the new quantum-resistant signatures are much larger, which makes certificates bulkier and connections slower - so the industry is working on cleverer, more efficient certificate formats to handle it. That part is still being built. If you want the engineer's version of all this, we wrote a technical state-of-play for 2026 and a longer migration playbook.
For now: stay updated, use modern infrastructure, and don't let anyone scare you into a rushed purchase. The transition is real, but it is being engineered to happen mostly without you noticing - which is exactly how good infrastructure changes should feel.
Sources: NIST, FIPS 203/204/205 and Cloudflare, State of the Post-Quantum Internet.
Get the next post in your inbox
TLS monitoring tips and product updates. No spam, unsubscribe anytime.
Keep reading
Manage Your SSL Certificates by Just Asking Claude
I don't want to learn what PKI, CA, ACME, EKU stand for, I only want a working certificate for my website
How to Read Your SSL Scan Report (Without Being a Security Expert)
Related guides
-
What Is SSL/TLS Certificate Monitoring? A Complete Guide
A plain-English definition of SSL/TLS certificate monitoring, what it catches beyond expiry, and why shorter certificate lifespans are making it essential.
-
SSL/TLS Vulnerabilities - A Quick Guide for Non-Experts
A non-expert tour of well-known SSL/TLS vulnerabilities and how to check yours.