Breakthrough in Quantum Attack: Researcher Claims 1 Bitcoin Bounty

The threat of quantum attacks on cryptocurrency has become more tangible, as a researcher has successfully broken a 15-bit elliptic curve key, a crucial component of the underlying technology. This achievement, facilitated by quantum security startup Project Eleven, has earned the researcher a 1 bitcoin bounty, valued at approximately $78,000. While this breakthrough does not immediately compromise the security of bitcoin, it underscores the growing concern surrounding the potential vulnerability of elliptic curve cryptography to quantum attacks. The current security framework of bitcoin relies on 256-bit elliptic curve security, which is significantly more robust than the 15-bit key that was broken. Nonetheless, the fact that a 15-bit key was broken using publicly accessible quantum hardware raises important questions about the long-term security of cryptocurrencies. The previous public demonstration of a quantum attack was a 6-bit break, achieved by Steve Tippeconnic in September 2025. The recent achievement marks a substantial increase in the scale of quantum attacks, with a 512-fold expansion in just seven months. The implications of this breakthrough are far-reaching, with potential consequences for the security of various cryptocurrencies, including bitcoin and ether. As the field of quantum computing continues to evolve, the need for quantum-safe address types and post-quantum transition plans becomes increasingly pressing. In response to this growing concern, bitcoin developers have proposed migration paths, such as BIP-360, which aims to introduce quantum-safe address types. Similarly, other cryptocurrencies, including Ethereum, Tron, StarkWare, and Ripple, have published their own post-quantum transition plans. The fact that an independent researcher was able to achieve this breakthrough using cloud-accessible hardware, rather than relying on a national laboratory or private quantum chip, highlights the rapidly diminishing barriers to entry in the field of quantum computing. As the resource requirements for quantum attacks continue to decrease, the potential risks to cryptocurrency security are becoming increasingly pronounced. With an estimated 6.9 million bitcoin, approximately one-third of the total supply, stored in addresses whose public keys are already visible on-chain, the need for proactive measures to mitigate these risks has become a pressing concern.