Google Willow cuts quantum errors, spotlighting bitcoin wallet risk
Google says its Willow chip prepares key quantum states with about 40 times fewer errors, a hardware advance with implications for bitcoin's cryptography.
Google's Willow quantum chip can prepare the special states needed for advanced calculations with roughly 40 times fewer errors, according to a CoinDesk report. The result addresses one of the hardware bottlenecks that would matter in any future effort to attack bitcoin wallets.
The report frames the development as increasing the long-term quantum risk for older bitcoin holdings, particularly coins from the Satoshi era. Bitcoin wallets rely on elliptic-curve cryptography; a sufficiently capable quantum computer could, in theory, derive private keys from exposed public keys.
Google's claim concerns error reduction in state preparation, not a demonstrated break of bitcoin's cryptography. The source does not indicate that such an attack is feasible with current hardware.
The report describes the Willow result as reducing one technical barrier rather than as an immediate threat to bitcoin. Quantum computing remains an active research area, and the long-term question for bitcoin is how and when wallets would migrate to post-quantum cryptography.