Google researchers warned Tuesday that advances in the field of quantum computing could threaten the cryptographic systems underpinning cryptocurrencies and other digital infrastructure sooner than expected.
It has demonstrated that future quantum computers may be able to break elliptic curve cryptography—a cornerstone of modern digital security—using fewer qubits and computational steps than previously believed.
A quantum "breakthrough"?The report also outlines mitigation strategies, emphasizing that post-quantum cryptography is already well understood and deployable, though difficult to implement at scale. Transitioning blockchain systems, rotating keys, and avoiding reuse or exposure of public keys are among the recommended steps.
Today is a monumentous day for quantum computing and cryptography. Two breakthrough papers just landed (links in next tweet). Both papers improve Shor's algorithm, infamous for cracking RSA and elliptic curve cryptography. The two results compound, optimising separate layers of…
"While a cryptographically-relevant quantum computer (CRQC) before 2030 still feels unlikely, now is undoubtedly the time to start preparing,” he added.
Quantum computers and BitcoinShiv Shankar, CEO of Boundless, told Decrypt the rising concern should be viewed in context. “The risk is going up but this was expected. As we get closer and closer to a target date for full migration to PQC, the confidence in that timeline generally goes up. There's no cause for panic. The smartest and most brilliant minds in the world are active on this problem," he said.
Analysts at Bitfinex told Decrypt the risk should be understood as a long-term engineering challenge rather than an immediate existential crisis.
“Quantum computing represents a genuine engineering challenge for the cryptocurrency industry, but it is far from an existential threat in the current form," they said.
Bitcoin and other protocols' cryptographic foundations "were always understood to have a finite shelf life," they said, adding that, "the current debate is not a surprise to anyone who has been paying attention. What matters is that the industry is already moving."
The analysts said Justin Drake’s warning should be taken seriously but not interpreted as imminent danger. “Drake’s framing is measured and worth taking seriously," they said, calling a 10% probability of Q-Day by 2032 "a call to act with appropriate urgency." Even faced with an uncertain timeline, they added that they "would broadly agree with the sentiment that now is the time to prepare."
