The quantum threat looming over blockchain ecosystems has just reached a concerning symbolic milestone. A coalition of over 100 experts, including key figures from the Ethereum Foundation, StarkWare, and Eigen Labs, has unveiled research that significantly optimizes the theoretical cost of an attack against the Bitcoin and Ethereum protocols. In just two months, the researchers managed to halve the computational resources required to compromise the ECDSA algorithm used to secure cryptographic signatures on these networks. The benchmark score, which measures the operation's complexity, has plummeted by 86%, demonstrating progress far faster than the projections established by Google Quantum AI in the spring of 2026.
This technological breakthrough owes part of its success to an innovative collaborative model dubbed Open Autoresearch. Rather than relying solely on human expertise, the researchers integrated generalist artificial intelligence agents—such as Claude Code and Codex—to automate hypothesis generation and code optimization. This symbiosis between human intelligence and the computing power of LLMs made it possible to rapidly validate more efficient cryptographic circuits, highlighting that AI is now becoming a primary catalyst in quantum physics and cybersecurity research.
Despite these spectacular results, experts emphasize that no current machine has the capacity to break the security of Bitcoin or Ethereum. A vast gap remains between the theoretical requirement of 1,151 logical qubits and the material reality of contemporary processors, where even the most advanced chips feature only a few hundred physical qubits. Error correction, an essential step for an attack to be viable, requires a technological scale that has not yet been achieved. The risk is therefore not immediate, but this proof of technical feasibility necessitates a global reassessment of timelines regarding Q-Day, the pivotal moment when traditional cryptography will become obsolete.
Faced with this growing pressure, developers of both leading networks are accelerating their defense strategies. Ethereum aims for a transition to full post-quantum security by late 2029 via the Hegotá update, while Bitcoin is exploring Bitcoin Improvement Proposals (BIPs) to protect the millions of BTC deemed vulnerable due to the past exposure of their public keys. The urgency lies not in an imminent attack, but in the necessity of deploying long-term solutions, as these cannot be applied retroactively. The digital arms race is now underway, mobilizing both the crypto community and international regulatory bodies.