Quantum computing has been “just around the corner” for as long as most of us can remember.

It’s one of those technologies that always felt important, but never quite urgent. Something for researchers and physicists to worry about, not something that would show up in a security team’s risk register anytime soon.

But recently, that’s subtly started to shift. A steady build-up of signals that, taken together, start to feel hard to ignore.

You see governments investing heavily and talking about quantum in strategic terms, not just scientific ones. For example, the UK has recently announced a £2 billion funding programme for quantum technologies, signalling serious national commitment. You see large technology companies moving beyond theory and building systems that combine quantum and classical computing. You see researchers starting to solve problems that were previously out of reach.

Individually, none of this necessarily feels like a turning point, but collectively, it starts to feel like something is changing.

The Cyber Security Angle

If you work in cyber, that change lands in a very specific place: risk.

Not infrastructure. Not tooling. But risk.

For most organisations, quantum computing won’t arrive as a product you install or a platform you adopt. It will show up as a challenge to something that already exists: encryption.

Encryption

Modern systems rely on encryption far more than most people realise. It underpins secure communications, protects financial transactions, secures cloud environments, and holds identity systems together in the background.

It’s one of those things that quietly works, so we rarely think about it, but quantum computing has the potential to change that.

Not today. Probably not tomorrow either. But eventually.

The “Harvest Now, Decrypt Later” Problem

That creates a slightly uncomfortable dynamic. Unlike most technological shifts, this isn’t just about what quantum will enable, it’s also about what it could break.

One of the ideas getting more attention recently is “harvest now, decrypt later.”

The concept is simple: if you can’t break encryption today, you don’t need to. You can collect the data now and wait until you can.

That means information being transmitted and stored today could still have value years from now, when quantum capabilities catch up.

It’s a strange thought, because it turns a future risk into something that already exists in the present, quietly, in the background, without any visible impact yet.

Keeping Perspective

Quantum computers aren’t about to start breaking encryption at scale overnight. There are still real technical challenges: stability, error correction, and scaling systems beyond highly controlled environments.

We’re not there yet, but we are closer than we used to be.

In 2026, several key milestones highlight this:

• National research centers in the U.S. report progress toward scalable quantum systems.
• Companies like Toshiba are rolling out quantum-safe data protection tools, preparing for future decryption threats.
• Big tech and governments are being urged to prepare now for a quantum-era of cybersecurity, emphasizing the need for planning today.

From “Interesting” to “Noticeable”

For a long time, quantum computing sat comfortably in the “interesting but distant” category. Now it’s starting to edge closer to something organisations at least need to be aware of, even if they’re not acting on it yet.

What makes this shift interesting is that it doesn’t come with a single headline forcing action. Just a growing sense, over time, that the underlying assumptions we’ve relied on might not hold forever.

Why Cyber Needs to Watch

In cyber, these shifts matter because by the time a risk becomes obvious, it’s usually already been building for a while.

Quantum computing isn’t a problem to solve today, but it’s becoming something harder to ignore, and that, more than anything, is what makes this feel worth paying attention to.