In a recent interview with Bloomberg, Blockstream CEO Adam Back played down the immediate danger of quantum computing to the Bitcoin network, yet underscored the necessity for the industry to prepare for the future. As a key figure in Bitcoin's history due to his work in cryptography dating back to the 1990s, Back argued that while the quantum risk is theoretically real, it is not practically imminent.
He pointed out that current quantum hardware lacks error correction, a notion supported by recent papers that approach the issue from different angles, framing quantum computing as a long-term rather than short-term threat to cryptographic systems. Back emphasized that the focus should not be on dismissing the threat but on timing the response appropriately. He suggested that preparing Bitcoin and providing users with the option to migrate their keys to a quantum-resistant format over the course of a decade is the prudent approach.
This timeline aligns with the progress of post-quantum cryptography, which is transitioning from theoretical to practical implementation following the finalization of standards by NIST in late 2024. Back highlighted that preparation is already underway across the ecosystem, with ongoing research and deployment, citing a dedicated research team and the use of Blockstream's Liquid network as a testing ground. The challenge for the industry lies in coordinating a gradual and orderly migration before the quantum threat becomes pressing.