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FOAM

Open Protocol for Proof of Location on Ethereum

FOAM is an open protocol for proof of location on Ethereum. Our mission is to build a consensus driven map of the world, empowering a fully decentralized web3 economy with verifiable location data. FOAM incentivizes the infrastructure needed for privacy-preserving and fraud-proof location verification. The starting point for FOAM is static proof of location, where a community of Cartographers curate geographic Points of Interest on the FOAM map. Through global community-driven efforts, FOAM’s dynamic proof of location protocol will enable a permissionless and privacy-preserving network of radio beacons that is independent from external centralized sources and capable of providing secure location verification services.

3.9
5 4 expert ratings
Benchy 3.4
KYC
Experts
4.3
4.0
4.7
Review: coming soon PRO
~$13,750,000
value of tokens sold in ICO

Ended
Token
FOAM
Type
Price in ICO
0.0800 USD
Country
USA
Whitelist/KYC
KYC
ICO start
31st Jul 2018
ICO end
10th Aug 2018
Visit ICO website
Report
Changelly

About FOAM

FOAM incentivizes a distributed network of beacons with radio transceivers, called Zone Anchors, to be deployed. The first step in joining the network is sending signals to connect with and discover nearby Zone Anchors.

Proof of Location depends on accurate and synchronized clocks. Zone Anchors send messages until a consensus can be formed on the precise time. The timed difference of messages sent and received allow for location to be calculated and the geometry of the network to be determined. We rely on a Byzantine Fault tolerant clock synchronization protocol.

Once synchronized, groups of Zone Anchors can establish a Zone and pledge to offer location services that are enforced by smart contract safety deposits, which provide accountability to faulty behavior. A Zone maintains a quorum on Time and Space.

Zones can include time stamped messages from customers in a competitive market for a transaction fee. This is done while Zones are resynchronizing clocks and publishing their time logs to a data store. Validators provide fraud proofs and calculate Triangulations for precise location data to verify final Presence Claims.

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