Safeguarding cryptocurrency by disclosing quantum vulnerabilities responsibly

Google Quantum AI published a white paper updating quantum resource estimates for breaking the 256-bit elliptic curve discrete logarithm problem (ECDLP-256): two circuits use under 1,200 logical qubits with 90 million Toffoli gates and under 1,450 logical qubits with 70 million Toffoli gates, cutting physical qubit requirements by roughly 20x versus previous estimates.