Quantum Computing Threat to Crypto on the Horizon, Says Coinbase Advisory Board

A newly released report commissioned by Coinbase issues a warning about the looming threat of quantum computing to the crypto industry, emphasizing that while an immediate threat is unlikely, the industry cannot afford to delay preparations. The report, authored by a panel of experts including prominent cryptographers and academics, stresses that although today's blockchains are secure, the emergence of a powerful quantum computer could potentially break widely used encryption, necessitating immediate action. Concerns surrounding quantum risk have been gaining traction, with Google researchers suggesting that a sufficiently advanced quantum computer could potentially compromise Bitcoin's cryptography. In response, major crypto ecosystems such as the Ethereum Foundation have proposed new digital signature types designed to be safe against quantum computers, while others like Solana are experimenting with quantum-resistant wallet designs. The report highlights that current quantum machines lack the power to crack the cryptography underpinning major networks, but cautions against complacency, emphasizing the uncertainty surrounding the timeline for the development of a large-scale, fault-tolerant quantum computer. The authors stress that waiting for the threat to become urgent is not a viable strategy, citing guidance from the U.S. National Institute of Standards and Technology, which recommends migrating to quantum-resistant cryptography by 2035. The report notes that some assets may be more vulnerable than others, with Bitcoin wallets that have already revealed their public keys being potential targets. However, it also highlights that quantum-resistant cryptography already exists and is being standardized. The challenge lies in the fact that post-quantum digital signatures can be significantly larger than current ones, potentially increasing blockchain data costs and reducing throughput. The report outlines multiple transition strategies, including hybrid systems that combine existing cryptography with post-quantum updates, and recommends flexible approaches that avoid sacrificing current security or performance while enabling rapid upgrades later.