Breakthrough in Quantum Attack: Researcher Claims 1 Bitcoin Bounty

The threat of quantum attacks on cryptocurrency has become more real, with a recent breakthrough by researcher Giancarlo Lelli. He successfully broke a 15-bit elliptic curve key on publicly accessible quantum hardware, earning a 1 bitcoin bounty worth approximately $78,000. This achievement is considered the largest public demonstration of its kind and has significant implications for the security of major blockchains, including Bitcoin and Ethereum. Elliptic curve cryptography is a crucial component of cryptocurrency wallets, enabling them to prove ownership of funds without revealing private keys. However, quantum computers can potentially exploit this using Shor's algorithm, posing a threat to the underlying security of these systems. Lelli's achievement does not mean that Bitcoin is immediately vulnerable, as it uses 256-bit elliptic curve security, but it does highlight the rapidly advancing capabilities of quantum computing. The previous record was a 6-bit demonstration, and Lelli's result represents a 512-fold increase in just seven months. Theoretical estimates suggest that the resource requirements for a full 256-bit attack are decreasing rapidly, with some predictions putting the cost below 500,000 physical qubits. This has significant implications for the security of wallets with publicly visible keys, with approximately 6.9 million bitcoin potentially at risk. In response, developers are exploring migration paths, including the introduction of quantum-safe address types, to mitigate this threat.