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 preparation. As a pioneer in Bitcoin's history, known for his work in cryptography dating back to the 1990s, Back made his argument in a recent Bloomberg interview. He pointed out that current quantum hardware lacks error correction, a point also made in 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's main point is not to downplay the threat but to stress the need for timely preparation. He suggests that preparing Bitcoin and giving users the option to transition their keys to a quantum-resistant format over the course of a decade is a prudent approach.
This timeline aligns with the progression of post-quantum cryptography from theoretical to practical implementation, particularly following the standardization by NIST in late 2024. Back highlighted that preparation is already underway, with a team of researchers working on the issue, publishing papers, and implementing solutions, such as on Blockstream's Liquid network. The challenge for the industry is to manage a gradual and orderly migration before the quantum threat becomes urgent.