Experts Warn Crypto Industry Must Prepare for Quantum Computing Threat

A recent report commissioned by Coinbase has sounded the alarm on the potential threat of quantum computing to the crypto industry. While current blockchains are still secure, the report warns that a future 'fault-tolerant quantum computer' could break widely used encryption, making it essential for the industry to start preparing now. The report, authored by prominent cryptographers and academics, notes that Google researchers have estimated that a sufficiently advanced quantum computer could break Bitcoin's cryptography. In response, major crypto ecosystems have begun exploring new types of digital signatures and wallet designs that are safe against quantum computers. The report emphasizes that current quantum machines are not yet powerful enough to crack the cryptography underpinning Bitcoin, Ethereum, and other networks, but cautions against complacency, stating that a large-scale, fault-tolerant quantum computer will eventually be built. The timeline for this is uncertain, but the report suggests it is 'clearly on the horizon.' 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 recommends that the crypto industry begin preparing for the transition to quantum-resistant cryptography, which already exists and is being standardized. However, the transition is not expected to be easy, with post-quantum digital signatures potentially being tens to hundreds of times larger than current ones, leading to 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 a rapid upgrade later.