Quantum computing is becoming real and will soon be able to solve problems well beyond the capabilities of today’s fastest supercomputers. In the wrong hands, however, quantum computers will also create a new pain level for cybersecurity professionals. Recent advancements suggest that a cryptographically relevant quantum computer (CRQC) — one that can break commonly used encryption algorithms — is getting closer to reality. In February 2025, for example, Microsoft announced its Majorana 1, which it claims is the first quantum processor to use more stable topological quantum bits (qubits), the basic units of quantum information. Microsoft believes its quantum processor can eventually scale to 1 million qubits on a single chip. Majorana 1 is a long way from meeting its potential, but its announcement should be a warning to organizations that have yet to take post-quantum cryptography (PQC) seriously. Quantum computers will render current encryption algorithms obsolete and help sophisticated adversaries find new ways to compromise critical systems. Preparing for that inevitability starts with adopting PQC algorithms.

Full explainer : What are the threats quantum computers pose to today’s encryption algorithms — and how to prepare now to become “crypto-agile” enough to stay ahead of bad actors.