The trust gap
Modern records can prove who signed them, but not whether the evidence behind the record was anchored to physically observed execution behavior. That matters for trade documents, compliance packets, AI provenance, public-sector records, and any artifact that must remain credible years after creation.
Post-quantum cryptography is necessary, but it is still an algorithmic trust layer. FieldHash is designed for the missing layer: durable, portable evidence that a protected artifact was bound to measured hardware behavior and can be verified later, including offline.
FieldHash is not a replacement for PQC. It is a second evidence layer: mathematical authenticity plus physics-tethered provenance.
Why quantum matters
The quantum hardware is not decorative and not merely a randomness source. FieldHash uses hardware-executed measurement distributions as the primary verification signal for a Quantum Physical Unclonable Function, or Q-PUF. Those distributions are influenced by backend state, calibration, gate behavior, and noise characteristics, creating device-conditioned fingerprints that classical signatures alone do not provide.
Physical anchor
Quantum measurements add a hardware-conditioned signal to otherwise algorithmic provenance workflows.
Composed defense
Production verification combines statistical policy gates with integrity signatures and profile controls.
Backend agnostic
Users do not need their own quantum computer; FieldHash can call available provider APIs today.
What FieldHash does
FieldHash turns important digital artifacts into offline-verifiable evidence packages. Each certificate binds content hashes, quantum measurement statistics, backend metadata, policy profile, and cryptographic signatures into a portable trust object.
Hash
Bind the artifact with SHA-256/SHA-512 content digests.
Execute
Run a parameterized circuit through simulation or available QPU backends.
Fingerprint
Capture measurement distributions, noise statistics, and distribution digests.
Sign
Bind the evidence package with modern signatures, including post-quantum options.
Verify
Validate the certificate later through versioned standard, hardened, strict, or offline profiles.
Evidence, not assertion
The public evidence package documents real hardware execution, adversarial synthesis benchmarks, adaptive spoofing tests, cost data, and reproducibility materials. The claim boundary is explicit: FieldHash does not claim asymptotic runtime speedup at current scale. It claims security-oriented quantum utility.
Where it applies
The first high-impact use case is long-retention document integrity in workflows where trust must survive time, jurisdictional boundaries, and disconnected verification environments.
Trade and supply chain
Preserve tamper evidence for customs, logistics, bills of lading, and high-value cross-organization records.
Compliance evidence
Maintain offline-verifiable integrity for audit packets, regulated artifacts, and long-retention submissions.
AI provenance
Bind generated artifacts, model outputs, and research trails to evidence that survives beyond the application stack.
Critical records
Add a physical provenance layer for institutional evidence where future disputes or degraded trust are expected.
European enterprise posture
For European regulated teams, the practical wedge is not a blanket compliance guarantee or a generic sovereign-AI posture. It is governed evidence: what the AI was allowed to remember, what was rejected or rolled back, which artifacts were signed, and who can verify the trail later.
The enterprise deployment package can support customer-approved model routing, EU-region cloud providers, customer VPC or on-prem infrastructure, named subprocessor review, DPA/SCC support, retention/export/delete controls, and customer-owned audit logs with SIEM/GRC export where configured. Counsel and governance teams still decide compliance; Lumenais and FieldHash supply the evidence trail they can inspect.
Model and hosting control
Route through customer-approved models and deploy in EU-region cloud, customer VPC, or on-prem environments where configured.
Governance review packet
Prepare named subprocessors, DPA/SCC support, retention controls, and evidence ownership for enterprise review.
Audit-log ownership
Keep governed-memory and FieldHash evidence logs customer-owned, exportable, and suitable for SIEM/GRC workflows.
Review support, not legal advice
Provide verifiable evidence for counsel, CISO, and AI-governance teams without claiming legal compliance by default.
Next phase
FieldHash is ready for independent validation and carefully scoped pilots. The next work is not to broaden the claim; it is to harden the proof, expand backend conditions, and quantify impact in real document ecosystems.
The goal is practical: stronger digital trust now, using quantum hardware as a measured evidence source rather than waiting for a fault-tolerant future.
Read the proof package
Start with the public evidence package for the preprint, adversarial results, hardware reports, manifests, and reproducibility materials.