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

The threat of quantum attacks on cryptocurrency has become more tangible with the recent achievement of independent researcher Giancarlo Lelli, who has been awarded a 1 bitcoin prize for breaking a 15-bit elliptic curve key on publicly accessible quantum hardware. This breakthrough, which is 512 times larger than the previous public demonstration in September 2025, has significant implications for the security of cryptocurrencies such as Bitcoin and Ethereum. Elliptic curve cryptography, which is used to secure transactions and control funds, is vulnerable to quantum attacks that could potentially derive private encryption keys from public counterparts. While Lelli's achievement does not pose an immediate threat to Bitcoin, which uses 256-bit elliptic curve security, it highlights the rapid progress being made in quantum computing and the need for the cryptocurrency community to develop and implement quantum-safe solutions. Theoretical estimates suggest that the resource requirements for a full 256-bit attack are decreasing, making it essential for developers to propose and implement migration paths to post-quantum cryptography, such as BIP-360, to ensure the long-term security of cryptocurrencies.