Quantum Computing Threat Looms Large for Crypto, Says Coinbase Advisory Board

A newly released report, commissioned by Coinbase, highlights the potential threat quantum computing poses to the cryptocurrency industry, emphasizing the need for urgent action to mitigate this risk. The report, which was authored by a panel of prominent cryptographers and academics, including Dan Boneh of Stanford University, Justin Drake of the Ethereum Foundation, and Sreeram Kannan of Eigen Labs, stresses that while today's blockchains remain secure, the possibility of a future 'fault-tolerant quantum computer' breaking widely used encryption is becoming increasingly plausible. As a result, the report concludes that preparation must begin now to address this potential threat. Recent months have seen growing concerns around quantum risk, with Google researchers suggesting that a sufficiently advanced quantum computer could potentially break Bitcoin's cryptography. In response, major crypto ecosystems have started developing strategies to address this risk, with the Ethereum Foundation proposing new types of digital signatures designed to be safe against quantum computers, and Solana experimenting with quantum-resistant wallet designs. The report emphasizes that current quantum machines are still far from powerful enough to crack the cryptography underpinning Bitcoin, Ethereum, and other networks, but cautions against complacency, stating that a large-scale, fault-tolerant quantum computer will eventually be built, although the timeline is uncertain. The report highlights the uncertainty surrounding the timeline, with estimates ranging from a few years to a decade or more, and no reliable way to predict breakthroughs. This uncertainty is reflected in guidance from the U.S. National Institute of Standards and Technology (NIST), which recommends migrating to quantum-resistant cryptography by 2035, a timeline the report suggests may even prove optimistic. The report stresses that waiting for the threat to become urgent is not a viable strategy, emphasizing that transitions across blockchains, wallets, and exchanges could take years to execute safely. Some assets may be more vulnerable than others, with Bitcoin wallets that have already revealed their public keys potentially being targeted, while those still protected behind hash functions may be safer in the short term. The report notes that quantum-resistant cryptography (PQC) already exists and is being standardized by NIST, but highlights the challenges associated with implementing this technology, including increased blockchain data costs and reduced throughput. The report outlines multiple transition strategies, including hybrid systems that combine existing cryptography with post-quantum updates or allow a gradual switch when needed, and recommends flexible approaches that avoid sacrificing current security or performance while enabling a rapid upgrade later. Ultimately, the report concludes that the time to begin preparing for the potential threat of quantum computing is now.