Google researchers raised concerns within the cryptocurrency sector on Tuesday, suggesting that future quantum machines might require fewer resources to undermine the classical encryption that secures blockchains, like Bitcoin. This finding contradicts the usual expectations regarding when quantum threats to digital assets might emerge.
According to a blog post on Tuesday, Google reported a 20-fold decrease in the resources needed for a quantum machine to break the encryption of a blockchain network. Consequently, the researchers advised that the shift to post-quantum cryptography should begin immediately.
The emergence of cryptographically relevant quantum computers poses a significant risk to cryptocurrencies, necessitating careful examination of potential developments where quantum computing meets digital finance, as highlighted in a Google white paper.
It seems that the quantum computing and cryptocurrency sectors have operated quite separately. However, with reduced resource requirements, there’s an urgent need for these two industries to converge.
Moreover, not only are 6.7 million Bitcoins at risk—including those believed to belong to the anonymous creator, Satoshi Nakamoto—but so too are the protocols for the real-world asset tokenization market. This market is projected to surpass $16 trillion by 2030, according to preliminary plans.
Alex Pruden, CEO and co-founder of Project Eleven, a quantum computing research firm, commented on the implications: “Their fast clock architecture could crack a private key in just nine minutes, while a Bitcoin block usually takes about 10 minutes to process. This changes the threat model entirely. Every Bitcoin transaction could be at risk.”
Alex Thorne, who leads enterprise research at Galaxy Digital, noted that Google’s findings suggest that the gap between now and the so-called ‘Q-day’ may close faster than previously considered.
“While it’s unlikely that quantum computers will target Bitcoin or the blockchain within the next five years, Google’s research marks significant advancements,” he said.
Although quantum computers capable of effectively interfacing with blockchain technology don’t yet exist, Google researcher Craig Gidney mentioned a 10% chance that one could be developed by 2030. Meanwhile, Google plans to transition its infrastructure to post-quantum cryptography by 2029.
Pruden pointed out that Bitcoin has yet to demonstrate any significant plans for transition, highlighting a crucial gap that needs to be addressed.
