{"id":2892,"date":"2026-03-18T17:59:42","date_gmt":"2026-03-18T16:59:42","guid":{"rendered":"https:\/\/showcase-preprod.neverhack.dev\/b\/?p=2892"},"modified":"2026-03-18T18:09:27","modified_gmt":"2026-03-18T17:09:27","slug":"quantum-computing-and-cybersecurity-what-you-need-to-know-before-its-too-late","status":"publish","type":"post","link":"https:\/\/neverhack.com\/b\/en\/blog\/quantum-computing-and-cybersecurity-what-you-need-to-know-before-its-too-late\/","title":{"rendered":"Quantum\u00a0computing and\u00a0cybersecurity:\u00a0what you need to know before\u00a0it is\u00a0too late\u00a0"},"content":{"rendered":"\n

You have probably heard the term \u201cquantum computing\u201d more and more over the past few years. Tech giants are racing to build them, governments are funding them, and security experts are warning about them. But what exactly is a quantum computer, and why should your organization care right now? <\/p>\n\n\n\n

A different kind of computer <\/h2>\n\n\n\n

To understand quantum computing, start with what you already know. A classical computer<\/strong> (the one on your desk or in your pocket) processes information as bits<\/strong>: tiny switches that are either off (0) or on (1). Every calculation happens step by step<\/strong>, following strict logical rules. <\/p>\n\n\n\n

A quantum computer<\/strong> works on an entirely different principle. Instead of bits, it uses \u201cqubits<\/strong>\u201d, which can represent 0 and 1 simultaneously, a property called superposition. On top of that, qubits can be entangled, meaning the state of one instantly influences another, regardless of distance. The result? A quantum computer can explore an enormous number of possibilities at once<\/strong>, solving<\/strong> certain categories of problems exponentially faster<\/strong> than any classical machine ever could. <\/p>\n\n\n\n

To be clear: quantum computers are not just “faster computers.”
They are a fundamentally different tool, one that happens to be extraordinarily good at a specific set of tasks, including breaking the encryption that protects the internet. <\/p>\n\n\n\n

Why this is a cybersecurity problem <\/h2>\n\n\n\n

Most of the encryption securing your emails, financial transactions, and digital identities today relies on mathematical problems that are practically impossible to solve with classical computers. Algorithms like RSA and ECC, the backbone of modern secure communications, are safe precisely because factoring large numbers or solving discrete logarithms would take thousands of years with today’s machines. <\/p>\n\n\n\n

A sufficiently powerful quantum computer running an algorithm called Shor’s algorithm could crack these protections in hours. Authentication systems, digital signatures, secure payment channels: all of it becomes vulnerable. <\/p>\n\n\n\n

The credible risk window, according to most experts, is somewhere between 2030 and 2035. And the consequences could extend well beyond that window: impacts on digital identity and signature integrity<\/a> are expected to persist through 2040. That may sound distant, but one threat is already active today.\u00a0<\/p>\n\n\n\n

Harvest now, decrypt later <\/h2>\n\n\n\n

Even without a quantum computer capable of breaking encryption today, adversaries (including nation-state actors) are already collecting encrypted data with patience. The strategy is simple: harvest sensitive information now, store it, and decrypt it once quantum capabilities are mature enough. This is known as \u201cHarvest now, decrypt later\u201d (NHDL). <\/p>\n\n\n\n

For organizations handling long-lived, high-value data (medical records, legal documents, financial contracts, state secrets) this is not a future problem. It is a present one. <\/p>\n\n\n\n

The regulatory clock is ticking <\/h2>\n\n\n\n

Governments and regulators are not standing still<\/strong>. In\u00a0Europe<\/strong>, the regulatory landscape<\/a> is already taking shape.\u00a0<\/p>\n\n\n\n