Vitalik Buterin Warns Quantum Computing Threatens Crypto Security by 2028

Ethereum co-founder Vitalik Buterin warned about potential quantum computing threats to cryptographic systems by 2028 at Devconnect, prompting industry debate.

This warning highlights urgent concerns over the future security of blockchain technologies, affecting Bitcoin and Ethereum, with the industry urged to prepare for quantum-resistant solutions.

Quantum Computing to Disrupt Crypto Security by 2028

At the Devconnect conference, Vitalik Buterin warned that quantum computers might compromise elliptic-curve cryptography by 2028. This foundational security layer is crucial for Ethereum and other digital systems, prompting a plea for the industry to shift towards quantum-resistant technology. His warning aligns with several experts pointing out the imminent risk quantum computing poses to Bitcoin and other digital assets.

The industry’s immediate focus involves transitioning to quantum-resistant cryptography. While quantum computing advancement projections vary, many experts agree with Buterin’s warning, acknowledging a need for cryptographic migration by 2028. “Quantum computers will be able to break elliptic-curve cryptography, the foundational security layer of Ethereum and most modern digital systems, possibly before the 2028 U.S. election…. The time to prepare is now,” said Vitalik Buterin. At the same time, physicists project a smaller quantum capacity, enough to delay massive security breaches but still pose a potential risk over time.

Market reactions varied as cryptocurrency analysts and industry figures echoed the potential dangers highlighted by Buterin. For instance, Tom Lee shared related reports to stress the relevance of quantum risks for institutional investors. Meanwhile, some firms are proactively responding by accelerating the development of quantum-resistant modules and technologies.

Crypto Markets React to Quantum Risk Projections

Did you know? The concept of quantum computers threatening cryptography isn’t new—discussions date back to the mid-2010s. Similar warnings were issued following Google’s 2019 quantum milestone, yet the market showed little immediate response until more recently.

As of November 20, 2025, Ethereum (ETH) is valued at $3,031.29, according to CoinMarketCap. The market cap stands at formatNumber(365864931998, 2) with a trading volume of formatNumber(41182734536, 2), representing a 15.86% shift in 24 hours. Ethereum’s price declined by 0.99% over the last day, 12.54% in the past week, and over 21% within the month.

Experts from Coincu highlight potential long-term outcomes from the quantum threat as technological focus shifts. These include enhancements in cryptographic systems to maintain security and trust in blockchain technologies. A significant transition in cryptographic techniques could reshape industry security standards.