Breakthrough in Quantum Attack: Researcher Claims 1 Bitcoin Bounty

The threat of quantum attacks on cryptocurrency has become more tangible with the recent achievement of Giancarlo Lelli, an independent researcher who has been awarded a 1 bitcoin bounty for breaking a 15-bit elliptic curve key on publicly accessible quantum hardware. This breakthrough, made possible through the use of quantum computing, has significant implications for the security of cryptocurrencies such as Bitcoin and Ethereum. Elliptic curve cryptography, which is the foundation of crypto wallet security, relies on the principle that deriving a private key from a public key is computationally infeasible. However, the use of quantum computers running Shor's algorithm challenges this assumption, potentially compromising the security of these systems. Although Lelli's achievement does not immediately threaten the security of Bitcoin, which uses 256-bit elliptic curve security, it does demonstrate the rapid progress being made in quantum computing and its potential to undermine current cryptographic protocols. The previous record, set by Steve Tippeconnic in September 2025, was a 6-bit demonstration, and Lelli's result represents a significant jump of 512 times. The implications of this breakthrough are far-reaching, with estimates suggesting that approximately 6.9 million bitcoin are vulnerable to quantum attacks due to their public keys being visible on-chain. In response to this threat, developers are exploring migration paths, including the implementation of quantum-safe address types, to ensure the long-term security of cryptocurrencies.