Experts Warn: Quantum Computing Poses Imminent Threat to Cryptocurrency, Immediate Action Required

A newly released report, commissioned by Coinbase, serves as a warning to the cryptocurrency industry: while the current threat of quantum computing to crypto is low, the potential for a future breach is increasing, and preparation is essential. The 50-page paper, authored by a team of prominent cryptographers and academics, stresses that although today's blockchains are secure, the possibility of a 'fault-tolerant quantum computer' capable of breaking widely used encryption is becoming more plausible. As a result, the industry must start preparing now. Google researchers have estimated that a sufficiently advanced quantum computer could potentially break 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. The report emphasizes that current quantum machines are not powerful enough to crack the cryptography underpinning Bitcoin, Ethereum, and other networks, but cautions against complacency. The authors stress that a large-scale, fault-tolerant quantum computer will eventually be built, although the timeline is uncertain. The U.S. National Institute of Standards and Technology recommends migrating to quantum-resistant cryptography by 2035. The report suggests 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. Quantum-resistant cryptography already exists and is being standardized, but implementing it will not be easy, as post-quantum digital signatures can be significantly larger than current ones, increasing blockchain data costs and reducing 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. Ultimately, the authors recommend flexible approaches that avoid sacrificing current security or performance while enabling a rapid upgrade later.