Researcher Breaks 15-Bit ECC Key on Quantum Hardware, Signals Potential Bitcoin RiskIndependent researcher Giancarlo Lelli broke a 15-bit ECC key using public quantum hardware, winning a 1 BTC bounty and marking the largest public quantum attack demonstration to date. Estimates suggest breaking 256-bit ECC may require about 500,000 qubits, with around 6.9 million bitcoins potentially exposed, highlighting the need for post-quantum upgrades.https://t.co/yhM4WNcgh9 ...