Recent advances in quantum computing are accelerating the timeline for Q-Day, when quantum computers could break widely-used RSA and elliptic curve cryptography. Big Tech companies are at varying stages of preparing for post-quantum cryptography (PQC) migration, with some accelerating efforts while others maintain current timelines. The article warns of catastrophic consequences if quantum-vulnerable cryptography isn't replaced in time, citing the historical Flame malware attack as a cautionary example.
Background
Q-Day refers to the hypothetical point when quantum computers become powerful enough to break current public-key cryptography systems like RSA and ECC, which would compromise digital security worldwide. The transition to post-quantum cryptography is a major global effort to develop quantum-resistant algorithms.
- Source
- Ars Technica
- Published
- Apr 17, 2026 at 07:00 PM
- Score
- 8.0 / 10