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

The perceived threat of quantum attacks on Bitcoin's security has become more tangible. Quantum security startup Project Eleven awarded a 1 bitcoin prize, valued at approximately $78,000, to independent researcher Giancarlo Lelli for breaking a 15-bit elliptic curve key on publicly accessible quantum hardware. This achievement represents the largest public demonstration of its kind, posing a potential threat to Bitcoin, Ether, and other major blockchains. Elliptic curve cryptography is a crucial component of crypto wallets, enabling them to prove fund ownership without revealing private keys. However, quantum computers utilizing Shor's algorithm can challenge this security by attacking the underlying logic. Lelli's result, although significant, does not imply that Bitcoin is on the verge of being compromised, as it uses 256-bit elliptic curve security. The prize aimed to assess the progression of quantum attacks from theoretical concepts to public hardware experiments. The previous public break was a 6-bit demonstration, and Lelli's 15-bit result marks a substantial increase of 512 times in just seven months. While the threat to Bitcoin's security is still theoretical, the resource requirements for such an attack are decreasing rapidly. Estimates suggest that a full 256-bit attack could be achieved with less than 500,000 physical qubits, down from earlier estimates in the millions. This development has sparked concern, particularly for wallets with publicly visible keys, which could be vulnerable to quantum attacks. Approximately 6.9 million Bitcoins, or one-third of the total supply, are stored in such addresses. To mitigate this risk, Bitcoin developers have proposed migration paths, including the introduction of quantum-safe address types. The achievement serves as a reminder of the rapidly evolving landscape of quantum attacks and the need for the Bitcoin community to remain vigilant and proactive in addressing this potential threat.