According to Blockstream CEO Adam Back, the threat of quantum computing to the Bitcoin network is more of a long-term concern than an immediate danger. However, he emphasizes the importance of preparing for this eventuality. As a pioneer in the field of cryptography, dating back to the 1990s, Back asserts that while the theoretical risk of quantum computing is real, it is not yet a practical threat.
In a recent interview with Bloomberg, Back pointed out that current quantum hardware lacks error correction, which is a crucial component for breaking cryptographic systems. This sentiment is echoed in two recent papers, one a technical analysis and the other a satirical piece, both of which suggest that quantum computing poses a long-term rather than short-term risk to cryptography.
Back's primary concern is not to downplay the threat, but to ensure that the industry responds at the right time. He advocates for preparing Bitcoin and providing users with the option to migrate their keys to a quantum-resistant format, allowing for a gradual transition over the course of a decade.
This timeline is in line with the progress being made in post-quantum cryptography, particularly since NIST finalized its standards in late 2024. Back highlights that active preparation is already underway across the ecosystem, with ongoing research and deployment. He cites Blockstream's Liquid network as a testing ground for these developments.
The challenge for the industry is not to react to a sudden breakthrough, but to coordinate a slow and orderly migration before the quantum threat becomes urgent.