Bitcoin’s quantum threat is distant, but migration clock is ticking, says Adam Back Says

Tech Share Share this article Copy link X icon X (Twitter) LinkedIn Facebook Email Bitcoin’s quantum threat is distant, but migration clock is ticking, says Adam Back Says Researchers are advancing post-quantum protections even as current hardware remains far from breaking crypto systems By Olivier Acuna | Edited by Jamie Crawley Apr 8, 2026, 1:08 p.m. Make preferred on Adam Back, center, says it is not about agreeing on a quantum risk timeline, but instead on giving bitcoin holders time to migrate to quantum-resistant wallets. (CoinDesk/Personae Digital) What to know : Blockstream chief executive Adam Back said quantum computers do not yet pose a practical threat to Bitcoin, but argued the industry should begin preparing now. Back urged developers to give users roughly a decade to migrate their Bitcoin keys to quantum-resistant formats, framing quantum risk as a long-term challenge rather than an immediate crisis. He pointed to ongoing post-quantum cryptography research, including work by a 20-person team and experiments on Blockstream’s Liquid network, as evidence that a gradual, coordinated transition is already underway. Blockstream CEO Adam Back, downplayed the immediacy of quantum computing as a threat to the Bitcoin network, but emphasized the need for the industry to prepare. A foundational figure in Bitcoin history for his cryptography work, dating back to the 1990s, Back laid out his central argument, saying that while quantum risk is real in theory, it is not yet practical, in an interview with Bloomberg on Tuesday, Back noted that “the current hardware…generally doesn’t have any error correction.” That aligns with two recent papers highlighted in a thread on X , one a sober engineering analysis, the other a deadpan satire, which make that case from opposite directions. Together, they frame quantum computing as a long-term rather than near-term risk to cryptographic systems. However, Back said the “lede” is not about dismissing the threat but about timing the response correctly. “We don’t have to agree about the timeline for quantum computers to become powerful enough to be a threat, because the prudent thing to do is to prepare Bitcoin and give people the option to migrate their keys to a quantum ready format, and to have, let’s say, a decade in which to do that.” That timeline echoes reporting that post-quantum cryptography (PQC) is already moving from theory to implementation, particularly after NIST finalized standards in late 2024. Back also stressed that preparation work is already active across the ecosystem, pointing to ongoing research and deployment. “There’s a 20-person research team that’s been working on this. Publishing papers and implementing things, putting them live.” He cited Blockstream’s Liquid network as an early proving ground. The industry’s challenge is less about reacting to a breakthrough and more about coordinating a slow, orderly migration, before the risk becomes urgent. Bitcoin News More For You Encryption Supremacy: Zcash and Privacy in the Age of Scale By CoinDesk Research Mar 31, 2026 Commissioned by GenZcash Most crypto privacy models weaken as blockchain data grows. Encryption-based models like Zcash strengthen. CoinDesk Research maps the five privacy approaches and examines the widening gap. Why it matters : As blockchain adoption scales, the metadata available to machine learning models scales with it. Obfuscation-based privacy approaches are structurally degrading as a result. This report provides a comprehensive comparison of all five major crypto privacy architectures and a framework for evaluating which models remain durable as AI capabilities improve. 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