Breakthrough in Quantum Attack: Researcher Claims 1 Bitcoin Bounty

A significant milestone has been reached in the realm of quantum computing, as an independent researcher has successfully executed the largest public quantum attack to date on the underlying technology of cryptocurrencies. Giancarlo Lelli was awarded 1 bitcoin, valued at approximately $78,000, for breaking a 15-bit elliptic curve key on publicly accessible quantum hardware. This achievement marks a 512-fold increase over the previous public demonstration in September 2025. While this breakthrough does not pose an immediate threat to Bitcoin, which uses 256-bit elliptic curve security, it underscores the growing need for quantum-resistant measures to safeguard the security of cryptocurrencies. The attack exploited the vulnerabilities of elliptic curve cryptography, which is the mathematical foundation that enables crypto wallets to prove control over funds without revealing private keys. Lelli's achievement demonstrates that quantum computers can potentially derive private encryption keys from their public counterparts, using Shor's algorithm. Although the current record is still far from threatening the security of major blockchains, it highlights the rapid progress being made in the field of quantum computing and the importance of developing post-quantum transition plans to mitigate potential risks. In response to these developments, cryptocurrency developers are exploring migration paths, including the introduction of quantum-safe address types, to ensure the long-term security of their networks.