IonQ Models Quantum Threat to 256-Bit Encryption in New Study

IonQ's full-stack platform spans algorithms, architecture, and error correction and is powerfully positioned to help secure the world as Q-Day timeline accelerates

COLLEGE PARK, Md.— Sep. 8, 2026 — IonQ (NYSE: IONQ), the world’s leading full-stack quantum platform and foundry, today published the first complete, end-to-end fault-tolerant resource estimate for running Shor’s algorithm. The historic paper by IonQ’s research team uses the recently published Walking Cat architecture to demonstrate how a specific application can be optimized for a trapped-ion quantum computer. This work concludes that a 20,000-physical-qubit IonQ quantum computer is expected to break secp256k1, the 256-bit elliptic curve used by blockchain technology such as Bitcoin, in just under 26 days. IonQ chose to run Shor’s algorithm for secp256k1 because it is one of the most scrutinized cryptography standards in production today.

The result demonstrates IonQ’s powerful full-stack capabilities. IonQ’s quantum platform researchers reduced the resource requirements to break secp256k1 by optimizing in tandem the algorithm, compiler, hardware architecture, and error-correction layer. These optimizations map to high value scientific and commercial applications, bringing IonQ’s near-term machines firmly into the domain of utility-scale quantum computing