Researcher Claims 1 Bitcoin Bounty for Successfully Executing Largest Quantum Attack to Date

The potential quantum threat to Bitcoin's security has become more tangible with the latest breakthrough by an independent researcher. Giancarlo Lelli was awarded 1 bitcoin, valued at approximately $78,000, by quantum security startup Project Eleven for successfully breaking a 15-bit elliptic curve key on publicly accessible quantum hardware. This achievement represents the largest public demonstration of its kind and has significant implications for the security of Bitcoin and other major blockchains. Elliptic curve cryptography is a crucial component of cryptocurrency wallets, enabling them to prove control over funds without revealing private keys. However, the advent of quantum computers running Shor's algorithm poses a challenge to this security paradigm. Lelli's achievement, while notable, does not immediately compromise Bitcoin's security, as it uses 256-bit elliptic curve security. Nevertheless, the fact that a 15-bit key was broken on public hardware marks a significant milestone, outpacing the previous 6-bit demonstration by a factor of 512. Theoretical estimates suggest that the resource requirements for a full 256-bit attack are decreasing rapidly, with some predictions placing the cost below 500,000 physical qubits. This development has sparked concern among Bitcoin developers, who are exploring migration paths, including the proposed BIP-360, to introduce quantum-safe address types. The broader community is also taking notice, with Ethereum, Tron, StarkWare, and Ripple publishing post-quantum transition plans. As the quantum threat landscape continues to evolve, the latest breakthrough serves as a reminder of the need for proactive measures to ensure the long-term security of cryptocurrencies.