Adam Back, CEO of Blockstream, has downplayed the immediate threat of quantum computing to the Bitcoin network, but emphasized the need for the industry to prepare for the future. As a pioneer in Bitcoin's history, with a background in cryptography dating back to the 1990s, Back argued that while the theoretical risk of quantum computing is real, it is not yet a practical concern.
In a recent interview with Bloomberg, Back noted that current quantum hardware lacks error correction, a point supported by two recent research papers. These papers, one a technical analysis and the other a satirical piece, both suggest that quantum computing poses a long-term rather than short-term risk to cryptographic systems. However, Back stressed that the focus should not be on dismissing the threat, but on responding to it in a timely manner. He suggested that the industry should prepare Bitcoin for a potential quantum threat and give users the option to migrate their keys to a quantum-resistant format over the course of a decade.
This timeline aligns with the development of post-quantum cryptography, which is transitioning from theoretical research to practical implementation, particularly after the standardization of PQC by NIST in 2024. Back also highlighted the ongoing research and deployment efforts across the ecosystem, citing a team of 20 researchers working on post-quantum cryptography and the implementation of these solutions on Blockstream's Liquid network. The challenge for the industry is to coordinate a gradual and orderly migration to post-quantum cryptography before the risk becomes urgent.