Cryptocurrency Industry Warned of Looming Quantum Computing Threat

A newly released report, commissioned by Coinbase, cautions the cryptocurrency industry about the impending threat of quantum computing to its security. The report, authored by a panel of experts including renowned cryptographers and academics, stresses that while current blockchains are secure, the emergence of a fault-tolerant quantum computer capable of breaking widely used encryption is becoming increasingly plausible. As a result, the industry must start preparing for this eventuality. The report notes that Google researchers have estimated that a sufficiently advanced quantum computer could potentially break Bitcoin's cryptography, prompting major crypto ecosystems to begin developing strategies to counter this threat. For instance, the Ethereum Foundation has proposed new digital signature types designed to be safe against quantum computers, while Solana and others are exploring quantum-resistant wallet designs. Although current quantum machines lack the power to crack the cryptography underpinning Bitcoin, Ethereum, and other networks, the report warns against complacency, citing the uncertainty surrounding the timeline for the development of a large-scale, fault-tolerant quantum computer. The U.S. National Institute of Standards and Technology recommends migrating to quantum-resistant cryptography by 2035, a deadline the report suggests may be overly optimistic. The report emphasizes that waiting for the threat to become urgent is not a viable strategy, as 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. However, quantum-resistant cryptography already exists and is being standardized by NIST. The challenge lies in implementing this new cryptography, as 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.