IonQ estimates that a quantum computer with 20,000 qubits could breach Bitcoin's secp256k1 security in about 26 days, while securing corporate data against quantum threats.
IonQ has revealed that a fault-tolerant quantum computer equipped with about 20,000 physical qubits could potentially take around 26 days to break the secp256k1 cryptography used in Bitcoin.
This marks the first comprehensive estimate of resources needed to run Shor’s algorithm on a specific quantum architecture, showcasing optimization for trapped-ion quantum systems.
“This work concludes that a…” — IonQ (@IonQ_Inc) September 8, 2026
In addition, IonQ announced an $8.18 million contract aimed at enhancing corporate data protection against quantum threats.
Quantum Threat to Bitcoin
The researchers conducted a detailed analysis to assess the resources required to execute Shor’s algorithm against the elliptic curve cryptography of secp256k1, which is integral to Bitcoin and other cryptographic systems.
They concluded that approximately 19,397 physical qubits, 1,457 logical qubits, and nearly 39 million Toffoli logical gates would be necessary, estimating a time of about 25.7 days for a single execution.
IonQ claims this is the first tailored estimate for a specific quantum computer setup, factoring in the algorithm, compiler, hardware architecture, and error correction.
It is crucial to note that this is merely a resource estimate and not an actual attack. IonQ expects to have the necessary systems in place by around 2028.
Impact on Cryptocurrency Security
The potential risk arises from the cryptographic signatures used in Bitcoin rather than from its mining or consensus processes. A sufficiently advanced fault-tolerant quantum computer could leverage Shor’s algorithm to solve the underlying mathematical problems.
IonQ clarifies that its findings relate to issues of authentication and data integrity, not to decrypting previously intercepted data. The company also notes that newer post-quantum signature algorithms, such as ML-DSA and SLH-DSA, are not susceptible to such attacks.
New Partnerships for Quantum Protection
On the same day, IonQ formed a partnership with Congruity360, valued at $8.18 million, to create a quantum-resistant network infrastructure for U.S. corporations.
Congruity360 will incorporate IonQ's technology for post-quantum cryptography and quantum key distribution into its data management offerings, including Clavis QKD pairs and Solteris networking devices to secure data in transit.
This initiative aims to serve industries like finance, healthcare, and defense, where long-term data security is critical. Notably, StarkWare developers completed the first quantum-resistant transaction on Bitcoin's mainnet in August.
