Crypto Industry Warned to Prepare for Quantum Computing Threat

The crypto industry has been cautioned that the threat of quantum computing to its security is looming on the horizon. A 50-page report commissioned by Coinbase and authored by prominent cryptographers and academics highlights the urgent need for preparation, despite the current security of blockchains. The report emphasizes that the development of a fault-tolerant quantum computer capable of breaking widely used encryption is becoming increasingly plausible. 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 types of digital signatures designed to be safe against quantum computers, while others like Solana are experimenting with quantum-resistant wallet designs. The report stresses that current quantum machines are far from powerful enough to crack the cryptography underpinning Bitcoin, Ethereum, and other networks, but cautions against complacency. It suggests that the timeline for the development of a large-scale, fault-tolerant quantum computer is uncertain but clearly on the horizon, with estimates ranging from a few years to a decade or more. 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 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 transitioning to 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 or allow a gradual switch when needed. It recommends flexible approaches that avoid sacrificing current security or performance while enabling a rapid upgrade later, emphasizing that the time to begin preparing for the quantum computing threat is now.