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. With a background in cryptography dating back to the 1990s, Back emphasized the need for the industry to prepare for the potential risks associated with quantum computing.
In a recent interview with Bloomberg, Back pointed out that current quantum hardware lacks error correction, which aligns with the findings of two recent 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. Back stressed that the focus should not be on dismissing the threat, but rather on responding to it in a timely manner.
He suggested that the industry should prepare Bitcoin for the potential risks and give users the option to migrate their keys to a quantum-resistant format over the course of a decade. This timeline is consistent with the development of post-quantum cryptography, which is already transitioning from theoretical concepts to practical implementation, particularly after the standardization of post-quantum cryptography by NIST in 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 these new technologies. The main challenge for the industry is to coordinate a gradual and orderly migration to post-quantum cryptographic systems before the risk becomes urgent.