Google warns future quantum computers may crack tech that protects cryptocurrency, wants industry to …

Google researchers have sounded the alarm over the growing threat that future quantum computers pose to the security systems protecting Bitcoin and other major cryptocurrencies, saying that the crypto industry needs to start preparing now. In a blog post and accompanying white paper published this week, Google's research team warned that the computing power required to break the encryption safeguarding crypto wallets and transactions may be significantly lower than experts had previously believed.

Google, however, clarified that while no such machine is capable of doing this exists today, the threat is real as future quantum computers may.“Google has led the responsible transition to post-quantum cryptography since 2016. In a new whitepaper, we show that future quantum computers may break the elliptic curve cryptography that protects cryptocurrency and other systems with fewer qubits and gates than previously realized.

We want to raise awareness on this issue and are providing the cryptocurrency community with recommendations to improve security and stability before this is possible, including transitioning blockchains to post-quantum cryptography (PQC), which is resistant to quantum attacks,” the company said in a blog post.

What exactly is the risk

At the heart of the concern is a type of encryption called elliptic-curve cryptography (ECC), which is considered to be the mathematical backbone used to secure most crypto transactions.

Google's latest research suggests that a future quantum computer could crack a key part of this system, known as ECDLP-256, using roughly 20 times less hardware than earlier estimates had assumed.In plain terms: the barrier to breaking crypto security is lower than we thought, and it may fall sooner than the industry is ready for.Should Crypto Holders Panic?Not yet — but they should pay attention.Google was clear that Bitcoin and Ethereum are not suddenly vulnerable.

The researchers framed their paper as a warning, not a countdown to collapse, designed to give the industry time to respond. On Tuesday, Bitcoin actually shrugged off the news, rising as much as 2.6% to around $68,300.Still, the researchers struck a cautious tone, noting that the window to act is "increasingly narrow" and that the pace of technological progress means developers, exchanges, and wallet providers need to move faster.What's the Solution?Google is pointing to a newer form of security called post-quantum cryptography (PQC) — encryption systems specifically designed to hold up against the power of quantum machines."We urge all vulnerable cryptocurrency communities to join the migration to PQC without delay," the researchers wrote.The company is putting its money where its mouth is. Last week, Google announced a timeline to fully migrate its own internal security systems to post-quantum cryptography by 2029.The Wider Industry Is Already MovingGoogle isn't alone in sounding the alarm. Cryptocurrency exchange Coinbase set up an independent advisory board in January to study quantum computing's potential impact on the blockchain. That same month, Jeffrey's equity strategist Christopher Wood quietly pulled a 10% Bitcoin allocation from his model portfolio, citing quantum computing concerns.On the development side, several blockchain projects are already exploring quantum-resistant solutions — including QRL, Abelian, Algorand, Solana, and the XRP Ledger."These trailblazing projects demonstrate that transition to post-quantum cryptography is realistic," the Google researchers noted.A Narrowing WindowMatthew Kimmell, investment strategist at CoinShares, summed up the mood in the industry following the paper's release."The timeline is becoming shorter and more credible," he said. "What this research does is tighten the window in which the industry needs to progress research and agree on a plan of action. The good news is that the problem remains addressable."For now, the threat remains on the horizon — but Google's message is clear: the crypto world shouldn't wait until quantum computers are powerful enough to strike before it starts building its defenses.