Groundbreaking Quantum Attack: Researcher Claims 1 Bitcoin Bounty

A significant milestone has been achieved in the realm of quantum attacks, posing a potential threat to the underlying technology of cryptocurrencies like Bitcoin. Quantum security startup Project Eleven awarded a 1 bitcoin bounty, valued at approximately $78,000, to independent researcher Giancarlo Lelli for breaking a 15-bit elliptic curve key on publicly accessible quantum hardware. This accomplishment marks the largest public demonstration of its kind, surpassing the previous record by a factor of 512. The breakthrough has significant implications for the future of cryptocurrency security, as it underscores the growing concern of quantum attacks on elliptic curve cryptography, the mathematical foundation that enables crypto wallets to prove ownership of funds without revealing private keys. Although Lelli's achievement does not immediately compromise Bitcoin's security, which relies on 256-bit elliptic curve security, it highlights the rapidly advancing capabilities of quantum computers and the need for the cryptocurrency community to develop and implement quantum-safe solutions. The previous public demonstration, achieved by Steve Tippeconnic in September 2025 using IBM's 133-qubit quantum computer, was limited to a 6-bit key. Lelli's result expands this by a significant factor, demonstrating the rapid progress being made in the field of quantum computing. Theoretical estimates suggest that the resource requirements for a full 256-bit attack are decreasing rapidly, with a recent Google Research paper estimating the cost to be below 500,000 physical qubits. This has significant implications for the security of cryptocurrencies, particularly for wallets with public keys already visible on-chain, estimated to be around 6.9 million bitcoin. In response to these developments, Bitcoin developers have proposed migration paths, including the implementation of quantum-safe address types, while other cryptocurrencies like Ethereum, Tron, StarkWare, and Ripple have also published post-quantum transition plans.