IonQ Publishes End-to-End Fault-Tolerant Resource Estimate for Shor’s Algorithm on 256-Bit Elliptic Curves
IonQ has published a study describing a fault-tolerant quantum computing architecture called 'Walking Cat' that uses qLDPC codes and 19,397 physical qubits. The estimate indicates the architecture could break 256-bit elliptic curve cryptography, including schemes used to secure Bitcoin, in 25.7 days. The publication highlights the future vulnerability of current cryptographic standards and urges migration to quantum-resistant alternatives.
This resource estimate could prompt standards bodies and regulated industries to accelerate post-quantum cryptography migration timelines, treating 256-bit ECC as breakable with fewer physical qubits than previously assumed.