Why the mind-bending physics of quantum computing is terrifying for bitcoin and crypto - CoinDesk

Google’s latest quantum computing breakthrough suggests cryptographic threats to blockchain may arrive sooner than anticipated, potentially within years rather than decades. Researchers warn current encryption standards could become obsolete. Quantum computers leverage superposition and entanglement to solve complex problems exponentially faster than classical systems. This capability directly threatens Bitcoin’s ECDSA signatures, which secure transactions and wallets. Alphabet’s recent milestones indicate quantum supremacy in error correction, a critical hurdle for practical applications. Experts now estimate a 50% chance of breaking RSA-2048 encryption by 2030, accelerating previous timelines. Cryptocurrency developers are racing to implement post-quantum cryptography, but adoption remains slow. Legacy systems face compatibility challenges, leaving trillions in digital assets vulnerable during the transition. Markets underestimate the urgency, with quantum-resistant upgrades requiring years of testing. Analysts urge immediate action, comparing the risk to Y2K but with far greater financial stakes.