EAS-v2.0 / RFC 8785 Cryptographic Attestation Active

Chronos | ZK Audit & WebCrypto Verification Portal

Zero-knowledge temporal drift verification, in-browser WebCrypto attestation hashing, Bayesian changepoint surveillance, and longitudinal compliance trajectories.

Endpoint: /v1/chronos

Attestation Ingestion

Observed Compliance Score (0.00 – 1.00)0.88

In-Browser WebCrypto Verification

Verify bit-for-bit SHA-256 canonical digest parity against the client-side WebCrypto API without transmitting private payload keys.

Attestation Status
VERIFIED
RFC 8785 Canonical Digest
Longitudinal Trajectory
STABLE
Bayesian changepoints: 0 detected
Local WebCrypto Parity
MATCH
256-bit SubtleCrypto validation

Cryptographic Envelope Dossier

envelope: eas-v2:init
{
  "eas_version": "2.0",
  "envelope_id": "env_a8b9f7c2-8491-4e78-9e2e-chronos001",
  "emitted_at": "2026-10-18T16:00:00.000Z",
  "emitter": {
    "system": "chronos",
    "instance_id": "edge:chronos:primary",
    "mode": "federated"
  },
  "axis": "diagnostic",
  "subject": {
    "tenant_id": "institution-core",
    "subject_ref": "sys:credit-exit:model-a"
  },
  "payload": {
    "value": 0.88,
    "observed_at": "2026-10-18T16:00:00.000Z"
  },
  "attestation": {
    "sha256": "4c9e8312e02f1a60183921820461b17a783685bc170d49a377774900a8946e39",
    "verification": "RFC 8785 canonical hash match confirmed"
  }
}

Temporal Drift & Changepoint Trajectory

Real-time evaluation of telemetry points using half-life decay modelling and sequential posterior odds testing.

T-0 Hours (Latest)Raw Score: 0.88 | Decayed Weight: 1.000
Regime: Stable
T-24 HoursRaw Score: 0.86 | Decayed Weight: 0.871
Regime: Stable
T-72 HoursRaw Score: 0.84 | Decayed Weight: 0.658
Regime: Stable