Breakthrough in Quantum Attack: Researcher Claims 1 Bitcoin Bounty for Cracking Elliptic Curve Key

A recent quantum attack on a 15-bit elliptic curve key has raised concerns about the potential vulnerability of bitcoin and other cryptocurrencies to quantum computing. The attack, which was carried out by independent researcher Giancarlo Lelli, demonstrates the ability to derive a private encryption key from its public counterpart using publicly accessible quantum hardware. Although the attack is not yet powerful enough to threaten the security of bitcoin, which uses 256-bit elliptic curve security, it marks a significant step forward in the development of quantum attacks on cryptographic systems. The breakthrough has sparked renewed interest in the development of quantum-safe address types and post-quantum transition plans for cryptocurrencies, with bitcoin developers proposing migration paths such as BIP-360. The attack has also highlighted the potential risks for wallets whose public keys are already visible on-chain, with an estimated 6.9 million bitcoin potentially vulnerable to quantum attacks.