Quantum Computing Threat to Crypto Looms Large, Experts Warn

A newly released report, commissioned by Coinbase, serves as a warning to the crypto industry: although quantum computing does not currently pose an imminent threat to cryptocurrencies, it is imperative that the industry begins preparing for the potential risks associated with the advent of quantum computing. The report, authored by a panel of experts including renowned cryptographers and academics, underscores that while today's blockchains are secure, the possibility of a future fault-tolerant quantum computer capable of breaking widely used encryption is increasingly plausible. Google researchers have estimated that a sufficiently advanced quantum computer could potentially break Bitcoin's cryptography. In response, major crypto ecosystems have started developing strategies to address the quantum 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 not yet powerful enough to compromise the cryptography underpinning Bitcoin, Ethereum, and other networks, but cautions against complacency, stressing that the timeline for the development of a large-scale, fault-tolerant quantum computer is uncertain. The U.S. National Institute of Standards and Technology recommends migrating to quantum-resistant cryptography by 2035, a timeline that may prove optimistic. The report highlights the challenges associated with transitioning to quantum-resistant cryptography, including increased blockchain data costs, reduced throughput, and usability issues. It 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.