Crypto Under Threat: Experts Warn of Looming Quantum Computing Danger

A newly released report, commissioned by Coinbase, sounds the alarm on the potential risks posed by quantum computing to the cryptocurrency industry. The 50-page paper, authored by a panel of esteemed cryptographers and academics, cautions that although today's 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 without delay. The report highlights 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 mitigate this risk. The Ethereum Foundation has proposed new digital signature types designed to be safe against quantum computers, while Solana and other platforms are exploring quantum-resistant wallet designs. Although current quantum machines lack the necessary power to crack the cryptography underpinning Bitcoin, Ethereum, and other networks, the authors of the report advise against complacency, stressing that the development of a large-scale, fault-tolerant quantum computer is inevitable, albeit on an uncertain timeline. This uncertainty is a major concern, with estimates ranging from a few years to a decade or more, and no reliable way to predict breakthroughs. The report's guidance is in line with recommendations from the U.S. National Institute of Standards and Technology (NIST), which suggests migrating to quantum-resistant cryptography by 2035. However, the report's authors warn that waiting for the threat to become urgent is not a viable strategy, as transitioning blockchains, wallets, and exchanges to quantum-resistant cryptography could take years to execute safely. Some assets may be more vulnerable to quantum attacks than others, with Bitcoin wallets that have already revealed their public keys being potential targets. Fortunately, quantum-resistant cryptography already exists and is being standardized by NIST. Nevertheless, the transition to post-quantum cryptography will not be straightforward, as it can result in significantly larger digital signatures, increased blockchain data costs, and reduced 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.