How CEYO works.
CEYO attaches at the inference boundary and produces integrity-sealed artifacts under explicit policy scope.
The mechanism is intentionally narrow: capture what has been declared, canonicalize it deterministically, seal it cryptographically, and make it independently verifiable without default disclosure of proprietary internals.
- Operators define scope before artifacts are generated.
- Only declared fields are included; exclusions and masking happen before sealing.
- Verification confirms integrity and provenance under policy scope, not model correctness.
Five operational stages.
CEYO is not a general-purpose monitoring layer. It follows a fixed evidentiary sequence with explicit boundaries at each stage.
Stage logic
Place CEYO at a defined boundary where inference-time events can be observed without modifying model weights.
Collect only policy-scoped fields. Anything excluded or masked is handled before artifact creation.
Produce deterministic serialized bytes so verification does not depend on implementation quirks or output ordering.
Apply hashing and digital signatures to make post-seal alteration detectable and provenance checkable.
Allow an independent party to reproduce the validation path without requiring default exposure of proprietary internals.
Operational properties
Where CEYO sits in the stack.
CEYO is designed to operate beside inference workflows, not as a replacement for decision authority and not as a dependency on model internals.
| Pattern | What it means | Why it may be used | Boundary |
|---|---|---|---|
| Sidecar | CEYO runs adjacent to an application or model-serving process. | Local capture posture with clearer operational separation. | No modification of model weights by default. |
| Gateway | CEYO observes requests and responses at a controlled ingress/egress boundary. | Centralized evidentiary control for multiple downstream systems. | Scope is limited to the gateway-visible policy fields. |
| Wrapper | CEYO encapsulates a call boundary around an inference operation. | Explicit integration path for product teams that want cleaner instrumentation. | Still policy-scoped; not an open-ended telemetry feed. |
CEYO can support fail-open deployment posture. If sealing fails, inference continuity can remain independent while the event is logged or flagged for later review.
That means artifact generation supports oversight, but does not become the default operational gate unless an operator deliberately configures it that way.
What reviewers actually do.
Independent verification is mechanical. It does not depend on trusting the producer’s narrative about what happened.
Verification sequence
Re-run the declared canonicalization procedure to reproduce the byte representation used for sealing.
Calculate the digest over canonical bytes and compare the result to the artifact’s declared digest.
Use the public key reference or trusted key chain to confirm that the signature matches the declared digest.
Check that policy ID, policy version, disclosure tier, and any applicable policy hash match expected values.
What verification does not prove
Integrity of record is not the same as correctness of model output or operator judgment.
Acceptance in any regulatory, judicial, or internal proceeding is determined by the relevant authority.
Verification confirms the declared artifact path, not universal replay of every inference condition beyond scope.
- CEYO produces integrity-sealed records.
- Verification confirms integrity and provenance under declared policy scope.
- CEYO does not certify compliance, legality, fairness, or correctness of model output.