Quantum Computing Researchers Cut Cost of Attacking Bitcoin and Ethereum by 86%

Quantum computing researchers have made significant strides in reducing the cost of attacking Bitcoin and Ethereum. A crowdsourced challenge involving over 100 researchers and AI agents achieved an 86% decrease in the quantum computing cost of a key step in attacking these two major cryptocurrencies. This optimization, which took only two months to complete, has reduced the required logical qubits and Toffoli gates, shrinking the quantum attack margin. Although this does not enable an immediate attack, it highlights the urgency for blockchain networks to accelerate post-quantum security measures. Ethereum, for example, is targeting 2029 for full quantum resistance.

Experts emphasize that the threat is now driven by both hardware and algorithmic advances, underscoring the need for early migration across blockchain systems before practical quantum attacks become feasible. This challenge demonstrates the power of collaborative efforts in advancing cryptography research and development. The results of this challenge will likely have a significant impact on the future of cryptocurrency security.

The secp256k1 elliptic curve's optimized point-addition circuit is now more resistant to quantum attacks, but it does not eliminate the threat entirely. Blockchain networks must continue to prioritize post-quantum security measures to protect against potential breaches. The accelerated development of these measures will be crucial in maintaining the integrity and security of blockchain-based systems.