Breakthrough in Quantum Attack: Researcher Claims 1 Bitcoin Bounty

The theoretical threat of quantum attacks on bitcoin has become more tangible with a recent breakthrough. Quantum security startup Project Eleven awarded a 1 bitcoin bounty to independent researcher Giancarlo Lelli for breaking a 15-bit elliptic curve key on publicly accessible quantum hardware. This achievement marks the largest public demonstration of its kind, sparking concerns about the potential vulnerability of bitcoin and other major blockchains to quantum attacks. Elliptic curve cryptography, which underlies the security of crypto wallets, is being challenged by quantum computers running Shor's algorithm. Although Lelli's result does not pose an immediate threat to bitcoin, which uses 256-bit elliptic curve security, it highlights the rapid progress being made in quantum attacks. The previous public break was a 6-bit demonstration, and Lelli's 15-bit result represents a significant jump. Theoretical estimates suggest that the resource requirements for a full 256-bit attack are decreasing, making it more feasible for quantum computers to break the encryption. This has prompted bitcoin developers to propose migration paths, including the introduction of quantum-safe address types. The concern is particularly pressing for wallets with public keys already visible on-chain, which could be vulnerable to quantum attacks. As the field of quantum computing continues to evolve, the potential risks to bitcoin and other cryptocurrencies are becoming increasingly apparent.