The scale of quantum attacks against elliptic curve cryptography is increasing, and hardware requirements are falling significantly.

Researcher demonstration

According to reports, researcher Giancarlo Lelli was awarded 1 BTC by Project Eleven for breaking an elliptic-curve cryptography key using a quantum device.

The demonstration targeted a 15-bit ECC key, and observers note that the exercise aimed to show proof of concept rather than break production-grade keys.

Scaling and hardware requirements

Sources indicate that the effective scale of such attacks has increased by 512 times over the past year, reflecting algorithmic and engineering improvements.

At the same time, estimated qubit requirements have been revised downward; discussions now reference tens of thousands of qubits instead of the previously cited hundreds of thousands.

Risk to crypto assets

Analysts warn that these trends could put cryptographic assets worth billions of dollars at future risk, including major networks such as Bitcoin and Ethereum.

Industry estimates put approximately ~6.9 million BTC as potentially vulnerable to future advances in quantum key‑recovery capabilities, although exploitability timelines remain uncertain.

Implications and next steps

Progress reported in demonstrations and reduced hardware estimates has prompted renewed attention to post‑quantum migration and key‑management practices across the ecosystem.

Wallet custodians, protocol developers, and infrastructure providers are advised to monitor developments and evaluate readiness for post‑quantum cryptographic transitions.