Researchers at Google have warned that future quantum computers could potentially crack some of the cryptographic technologies used to protect Bitcoin and other digital assets with fewer resources than previously anticipated, making discussions about how the industry should respond more urgent. Google positioned this paper as a cautionary alert, aiming to provide the industry with time to prepare rather than predicting an imminent collapse.
Researchers at Google have warned that future quantum computers could potentially crack some of the encryption methods used to protect Bitcoin and other digital assets with fewer resources than previously anticipated, making discussions on how the industry should respond more urgent. The researchers did not claim that such machines already exist but noted that recent studies indicate the computational power required for such attacks may be lower than many earlier estimates.
In a Google Research blog post, the researchers stated that future quantum computers might compromise elliptic-curve cryptography, a widely adopted form of public-key encryption technology in the market. Their latest estimates suggest that the scale of quantum computing hardware needed to break ECDLP-256, which secures cryptographic wallets and transactions, could be reduced by approximately 20 times.
This does not mean that Bitcoin or Ethereum is immediately at risk. However, in a white paper released on Monday, the researchers stated that the clearest defense would be to transition to post-quantum cryptography (PQC), a new security framework designed to withstand attacks from powerful computational systems. They also called on the encryption industry to mitigate avoidable risks in the interim. The researchers said:
We urge all vulnerable cryptocurrency communities to accelerate their migration to PQC as soon as possible.
Google positioned this paper as a warning aimed at giving the industry time to prepare, rather than predicting an imminent collapse. Last week, Google proposed a timeline to fully migrate its own security systems to post-quantum cryptography by 2029.
Concerns about quantum computing posing a real threat to cryptocurrencies have persisted for years. In January this year, Coinbase Global established an independent advisory committee to study the impact of quantum computing on blockchain. That same month, Christopher Wood, Head of Global Equity Strategy at Jefferies, removed a 10% allocation to Bitcoin from his model portfolio, citing concerns that advancements in quantum computing could undermine the asset's security.
On Tuesday, amid attention drawn to Google's paper, the price of Bitcoin instead rose, with gains reaching up to 2.6%, climbing to approximately $68,300.
Nevertheless, the researchers noted that the actual emergence of such quantum computers may still occur later than the time required for public blockchains to complete their migration to post-quantum cryptography. However, the margin for error is becoming increasingly narrow. Given the pace of technological advancement, developers, exchanges, and wallet service providers should expedite efforts to strengthen system security before the threat materializes.
Matthew Kimmell, Investment Strategist at CoinShares, described the paper’s warnings as a form of 'responsible urgency.' He said: 'The window of time is shrinking and becoming more credible. The significance of this research is that it tightens the timeline for the industry to advance its research and reach actionable solutions. The good news is that this issue remains solvable.'
The researchers also highlighted that some early attempts are already underway, including post-quantum projects like QRL and Abelian, as well as related work on Algorand, and experiments on Solana and the XRP Ledger. 'These pioneering projects demonstrate that transitioning to post-quantum cryptography is feasible.'
Editor/Liam