Concrete scenario
What this looks like in practice
A probe executes an avoidance burn hours before the downlink window opens. Ground teams weeks later must confirm the command bundle, safety envelope, and timing metadata were signed onboard — not reconstructed from incomplete relay logs or reconstructed narratives in shift handoff notes.
Problem
What breaks today
Deep-space and high-latency links delay ground contact. Autonomous maneuvers must carry compact, signed evidence that survives weeks of transit, bit rot in relays, and still verifies when telemetry finally arrives at mission control.
Mechanism
How ZK-SNAP responds
Onboard systems mint receipts over commands, safety context, timestamps, and optional hybrid proof material sized for delayed disclosure and bandwidth-constrained relays. Verifiers replay cryptography when bundles arrive — without assuming continuous cloud connectivity or live vendor dashboards.
Verifiable outcome
What a verifier can check
- Command receipts verify offline from downlinked bytes alone.
- Safety profiles and timing fields are part of the signed claim.
- Hybrid crypto material evaluates only when declared and present.
- Delayed disclosure does not weaken signature checks at arrival.
Scope boundary
What a receipt does not replace
Receipts preserve signed command evidence — not orbital mechanics correctness, hardware redundancy, or mission authorization outside the instrumented control path.