In a recent interview with Bloomberg, Blockstream CEO Adam Back played down the immediate risks posed by quantum computing to the Bitcoin network, but emphasized the importance of preparing for the potential threat. As a pioneering figure in the history of Bitcoin, with a background in cryptography dating back to the 1990s, Back argued that while the theoretical risks of quantum computing are real, they are not yet a practical concern due to the lack of error correction in current hardware. This assessment is supported by two recent research papers, which approach the issue from different perspectives, but both conclude that quantum computing poses a long-term rather than short-term risk to cryptographic systems. Back stressed that the key issue is not to dismiss the threat, but to respond to it in a timely and prudent manner.
He suggested that the industry should prepare Bitcoin for the potential risks by giving users the option to migrate to quantum-resistant key formats, allowing for a gradual transition over the course of a decade. This timeline is in line with recent developments in post-quantum cryptography, which is shifting from theoretical research to practical implementation, following the finalization of standards by NIST in late 2024.
Back also highlighted the ongoing research and deployment efforts across the ecosystem, citing the example of Blockstream's Liquid network as a testing ground for new technologies. The main challenge facing the industry is not to react to a sudden breakthrough, but to coordinate a slow and orderly migration to new security standards before the risk becomes critical.