The race to secure the world's data against future quantum computers is no longer a distant concern. According to EU-Startups, in a piece titled "Quantum security: The clock is already running," the shift toward a post-quantum era is well underway — and the window to prepare is narrowing.
The core idea is straightforward, even if the technology behind it is not. Much of today's digital security relies on mathematical problems that ordinary computers cannot crack in any reasonable amount of time. A sufficiently powerful quantum computer, however, is expected to solve some of those problems far faster, potentially unravelling the encryption that protects everything from banking to private messages.
EU-Startups frames this as an urgent, already-running clock rather than a problem for some far-off future. The phrase "post-quantum era" refers to the period in which organizations must move to new forms of encryption designed to withstand quantum attacks.
Part of the urgency comes from a simple reality: data stolen today can be stored and decrypted later, once the technology matures. That means sensitive information sent now could be exposed years down the line, even before quantum computers are widely available.
The framing suggests that governments, businesses, and technology providers face pressure to begin the transition to quantum-resistant security sooner rather than later, given how long large-scale security upgrades typically take.
Why it matters: if the clock is truly already running, the choices made now about encryption will determine whether the data we rely on stays private in the decades ahead.