Adam Back, CEO of Blockstream, addressed the growing debate over whether quantum computing could soon compromise Bitcoin’s core cryptography, offering a measured view on the timeline and preparedness needed. Blockstream, founded in 2014, is known for its development of Bitcoin-related protocols and infrastructure, including innovations around privacy, scalability, and layer-two solutions such as the Liquid network. Back himself has played a significant role in Bitcoin development and the broader digital currency landscape.
Quantum threat remains distant but preparation advised
In a recent discussion with Bloomberg, Back outlined the current capabilities of quantum computers, emphasizing that their practical threat to blockchain cryptography remains far off. He pointed to the experimental nature of today’s quantum systems, noting most are still constrained by limited hardware and frequent computational errors.
He cited the lack of real-world quantum machines able to run powerful algorithms relevant to breaking Bitcoin’s encryption. Back stated that no current quantum computer has demonstrated an ability to factor large numbers, with only trivial calculations possible so far.
Academic developments in quantum algorithms have been highlighted in recent studies. However, Back asserted these are unlikely to impact hardware-based risk in the near future. The practical breakthrough, if achieved, is generally believed by researchers to be decades away.
Despite this long timeline, Back recommended that the Bitcoin ecosystem should not be complacent. He encouraged gradual and well-planned upgrades, allowing a smooth transition to quantum-resistant signature schemes before any clear and present danger emerges.
Back explained that “the biggest calculation” quantum hardware has handled is factoring 21 into 7 and 3, illustrating how far the technology is from practical use against Bitcoin.
Steps towards post-quantum security and Bitcoin’s evolving role
Blockstream’s research team is already focusing on quantum-resistant technologies. Implementations have been introduced to Liquid, demonstrating proactive efforts to adapt Bitcoin for future risks.
Back also noted the recent approval of post-quantum cryptography standards by the National Institute of Standards and Technology (NIST) in 2024. He described this as a turning point likely to shape future industry practices around secure key management and upgrades.
Beyond quantum concerns, Back dismissed theories that artificial intelligence or future AI systems might compromise Bitcoin’s fundamental cryptographic foundations. He perceived AI primarily as a productivity tool beneficial for developers and researchers.
Shifting focus, Back characterized Bitcoin as “digital gold,” suggesting that its primary role will remain as a store of value rather than a replacement for national currencies. He pointed to early government discussions, including in El Salvador and Switzerland, as examples of institutional interest evolving steadily.
On a separate note, Back was recently highlighted in the media as a potential candidate for the identity behind Bitcoin’s creation, reflecting ongoing curiosity in crypto history. Both Back and others in the space firmly denied any conclusive links to the original Satoshi Nakamoto.
