QCOS Quantum Isolation™
Secure multi-tenant execution for shared quantum hardware. Reduce cross-tenant leakage to statistically indistinguishable from random guessing with auditable evidence and quantified overhead.
The problem: multi-tenant QPUs create a physical side-channel
Cloud quantum computing is inherently shared. When different tenants execute on neighboring qubits, crosstalk and timing correlations can create a measurable side-channel. A co-tenant can attempt to infer the class of a victim workload using sensor circuits and statistical learning.
IP Leakage Risk
Algorithms, model structure, and circuit families can be inferred by malicious co-tenants.
Vendor Risk
Most providers lack isolation guarantees. Due diligence reveals no quantified security claims.
Compliance Risk
Hard to audit, hard to prove non-disclosure. Regulators require quantified security evidence.
What QCOS Quantum Isolation delivers
Quantified security with auditable evidence. Not marketing claims—statistical proof.
Quantified Security
Attack success reduced to random guessing. Wilson 95% CI includes 50%, exact binomial test fails to reject p = 0.5.
Auditable Evidence
Tamper-evident Isolation Evidence Bundle per run. Export as signed JSON and PDF for security reviews.
Controlled Overhead
Security-utility tradeoffs are explicit and bounded: 11% qubit overhead, 15% throughput impact, <0.5% fidelity loss.
Physical Isolation Model
Not synthetic masking. Real topological buffering, layout randomization, temporal decorrelation, and decoy injection.
How it works
A layered isolation strategy targeting the physical leakage channel
Topological Buffering
Topology-aware placement enforces physical distance between tenants to attenuate electromagnetic coupling.
Per-Job Layout Randomization
Qubit mapping changes per execution to prevent cross-run statistical accumulation attacks.
Temporal Decorrelation
Randomized timing and reset barriers reduce synchronization and drift exploitation between tenants.
Active Decoy Injection
Independent decoy workloads reduce side-channel SNR. Generated independently of victim structure with verified second-order impact.
Isolation tiers
Choose the right balance of security and overhead for your workload
STANDARD
Logical isolation
- Scheduler-level separation
- Basic buffer policy
HIGH
Buffer + temporal gap
- 1-qubit buffer zone
- 100μs scheduling gap
- Reset barriers
MAXIMUM
Verified reset barriers
- 2-qubit buffer zone
- 1ms scheduling gap
- Post-reset verification
EXTREME
Maximum quantifiable reduction
- 3-qubit dynamic buffer
- 5ms temporal gap
- Per-job layout randomization
- Active decoy injection
- Tamper-evident evidence bundle
Who this is for
Built for regulated industries and security-conscious organizations
Financial Services
Protect proprietary trading algorithms and risk models from co-tenant inference attacks.
Government & Defense
Meet isolation requirements for classified workloads on shared quantum infrastructure.
Pharma & Life Sciences
Prevent leakage of molecular structures and drug discovery algorithms to competitors.
Hardware Vendors
Offer multi-tenant quantum access with quantified isolation guarantees for enterprise customers.
Cloud Platforms
Build quantum service layers with auditable tenant isolation for enterprise procurement.
Industrial R&D
Protect materials science and optimization IP from inference attacks on shared QPUs.
What we don't claim
Built for procurement-grade credibility. Our claims are bounded by an explicit threat model and measurable metrics.
- No claim of universal physical limits across all architectures
- No claim of "zero leakage" — claims are bounded by explicit threat model
- All metrics validated with Wilson confidence intervals and exact binomial tests
- Multi-classifier validation guards against adaptive adversaries
- Overhead is quantified and transparent
Request access
Get a security review package or pilot design on your target QPU topology.
Contact: info@softquantus.com•NDA available on request
Download: Executive Brief
A buyer-friendly 1-page summary with risk framing, metrics, and overhead.
Request PDFFor Vendors: OEM Integration
QCOS can sit above your scheduler to provide isolation policies and evidence generation without changing your hardware stack.
Learn about OEM program