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
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.
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.”
