Clear DefinitionsProof of Coverage
1 min read
Pronunciation
[proof of kuh-ver-ij]
Analogy
Like surveyors validating each other’s sightlines to confirm that a network of lighthouses covers a coastline.
Definition
A protocol—used by Helium network—where nodes prove they are providing wireless network coverage by performing cryptographic challenges and witnessing each other’s radio transmissions.
Key Points Intro
PoC validates real‑world service provision via peer‑to‑peer radio challenges.
Key Points
Beaconing: Nodes broadcast challenges on LoRaWAN frequencies.
Witnessing: Nearby nodes attest reception cryptographically.
Challenge‑response: Verifies geographic coverage.
Reward: HNT tokens distributed based on valid proofs.
Example
A Helium hotspot transmits a PoC beacon; three neighboring hotspots witness and submit attestations, earning coverage rewards.
Technical Deep Dive
Proof packets include nonce signed by hotspot key. Witnessers verify signature, record SNR and timestamp, submit `poc_receipts` to blockchain which verifies merkle proofs of witnessing set.
Security Warning
Hotspot placement fraud can undermine coverage; use GPS anchors.
Caveat
Physical environment affects reliability; urban canyons reduce efficacy.
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