Researcher Claims 1 Bitcoin Bounty for Achieving Largest Quantum Attack on Underlying Technology

The threat of quantum attacks on bitcoin has become more tangible after an independent researcher, Giancarlo Lelli, successfully broke a 15-bit elliptic curve key using publicly accessible quantum hardware. This achievement earned him a 1 bitcoin bounty, worth approximately $78,000, as part of the Q-Day Prize awarded by quantum security startup Project Eleven. The breakthrough demonstrates the largest public demonstration of its kind, posing a potential threat to bitcoin, ether, and other major blockchains. However, it is essential to note that bitcoin's current 256-bit elliptic curve security remains intact, and Lelli's result does not imply an imminent threat to the cryptocurrency. The experiment highlights the rapid progress in quantum attacks, with the previous public break being a 6-bit demonstration just seven months ago. As the resource requirements for such attacks continue to decrease, the need for quantum-safe address types and post-quantum transition plans becomes increasingly pressing, with proposals like BIP-360 and initiatives from Ethereum, Tron, StarkWare, and Ripple aiming to address this concern.