According to Blockstream CEO Adam Back, the immediate threat of quantum computing to the Bitcoin network is low, but the industry must still prepare for the future. As a pioneering figure in Bitcoin's history, with a background in cryptography dating back to the 1990s, Back emphasized that while the theoretical risk of quantum computing is real, it is not yet a practical concern. In a recent interview with Bloomberg, Back pointed out that current quantum hardware lacks error correction, a sentiment echoed by two recent research papers.
These papers, one a serious analysis and the other a satirical take, both argue 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 rather on responding to it at the right time. 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 to practical implementation, particularly after the National Institute of Standards and Technology (NIST) finalized its standards in late 2024.
Back highlighted that preparation is already underway, with a team of researchers working on publishing papers and implementing solutions, such as Blockstream's Liquid network. The challenge for the industry is not to react to a sudden breakthrough, but to coordinate a gradual and orderly migration to post-quantum security before the risk becomes critical.