consensus
  • README
  • Blockchain Consensus Encyclopedia Infographic
  • CONTRIBUTING
  • Introduction
  • Blockchain Consensus?
  • Glossary
  • Categorizing consensus
  • Chain-based Proof of Work
    • Proof of Work (PoW)
    • Proof of Meaningful Work (PoMW)
    • Hybrid Proof of Work (HPoW)
    • Proof of Work time (PoWT)
    • Delayed Proof of Work (dPoW)
    • Proof of Edit Distance
    • ePoW: equitable chance and energy-saving.
    • Semi-Synchronous Proof of Work (SSPoW)
  • Chain-based Proof of Stake
    • Delegated Proof-of-Contribution (DPoC)
    • Secure Proof of Stake (SPoS)
    • Hybrid PBFT/Aurand
    • Proof of Stake (PoS)
    • Delegated Proof of Stake (DPoS)
    • Proof of Stake Time (PoST)
    • Proof of stake Boo (PoS Boo)
    • High Interest Proof of Stake (HiPoS)
    • Asset PoS (APoS )
    • Traditional Proof of Stake / Tiered Proof Of Stake (TPOS)
    • Casper the Friendly Finality Gadget (FFG)
    • Correct By Construction (CBC) Casper
    • Variable Delayed Proof of Stake (vDPOS)
    • Proof of Stake Velocity
    • Magi's Proof of Stake (mPoS)
    • Leased Proof of Stake (LPoS)
    • Delegated Proof of Importance (DPoI)
    • Leasing Proof of Stake (PoS/LPoS)
  • Chain-based Proof of Capacity/Space
    • Proof of Process
    • Proof of capacity (PoC)
    • Proof of Signature (PoSign)
    • Proof of Retrievability (POR)
    • Proof of Location
    • Proof of Reputation (PoR)
    • Proof of Proof (PoP)
    • Proof of History
    • Proof of Existence
    • Proof of Research (DPoR)
    • Proof of Activity
    • Proof of Weight (PoWeight)
    • Proof of Zero (PoZ)
    • Proof of Importance
    • Proof of Care (PoC)
    • Raft
    • Proof of Value (PoV)
    • Proof of Participation (PoP)
    • Proof of Believability
    • Proof of Stake (POS) / Proof of Presence (PoP)
    • Proof of Ownership
    • Proof of Quality (PoQ)
    • Proof of Space (PoC)
  • Chain-based Hybrid models
    • GRANDPA
    • Proof of authority (PoA)
    • Ethereum Proof of Authority
    • Limited Confidence Proof-of-Activity (LCPoA)
    • Proof of Work (PoW) / Nexus Proof of State (nPoS) or Nexus Proof of Holding (nPOH)
    • Proof of Activity
    • Proof of Work (PoW) / Proof of Stake (PoS) / Proof Of Care (PoC)
    • Proof of work (PoW) / High Interest Proof of Stake (HiPoS)
    • Proof of Work (PoW) / PoM / PoSII
  • Chain-based Proof of Burn
    • Proof of Processed Payments (PoPP)
    • Proof of Burn (PoB)
    • Proof of Time
    • Proof of Stake (PoS) / Proof of Disintegration (PoD)
  • Chain-based Trusted computing algorithms
    • Proof of Elapsed Time (PoET)
  • Chain-based PBFT and BFT-based Proof of Stake
    • leaderless BFT dual ledger architecture
    • Albatross
    • asynchronous BFT protocol
    • BFTree
    • Byzantine Fault Tolerance (BFT)
    • Delegated Byzantine Fault Tolerance
    • Federated Byzantine Agreement
    • HotStuff
    • LibraBFT
    • Modified Federated Byzantine Agreement (mFBA)
    • Ouroboros
    • Practical Byzantine Fault Tolerance
  • Chain-based others
    • Proof of Trust (PoT)
    • Proof of Devotion
    • Snowglobe
    • Avalanche
    • Serialization of Proof-of-work Events (Spectre)
    • Scrypt-adaptive-N (ASIC resistant)
  • Chain-based DAG
    • BlockFlow
    • Direct Acyclic Graph Tangle (DAG)
    • Hashgraph
    • Block-lattice - Directed Acyclic Graphs (DAGs)
  • Magi's proof-of-work (mPoW)
  • Common Attacks
  • Performance indicators
  • ThresholdRelay
  • Holochain
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  1. Chain-based Proof of Capacity/Space

Proof of Location

PreviousProof of Retrievability (POR)NextProof of Reputation (PoR)

Last updated 6 years ago

Proof of Location is a technology that enables a device's physical location coordinates to be broadcast to the blockchain in a way that other devices can rely on the location data without having to trust the broadcasting device.

Position-dependent applications include supply chain, parametric insurance, KYC/AML verification, or even consumer transactions. E.g, an online store might need to prove that an item has been delivered to you so that the smart contract can automatically trigger a payment from your wallet.

Today’s geo-location tools are great for determining the location of a device, but cannot offer reliable and trusted location verification services. They are uni-directional and un-encrypted, which makes it problematic to rely on GPS for smart contracts that need to execute when spatial parameters are met. Dynamic Proof of Location empowers a permission-less and autonomous network of radio beacons that can offer secure location verification services through time synchronization in a decentralized manner.

Challenges

  • Difficult to implements

Used in

  • The Proof of Location protocol empowers a permission-less and autonomous network of radio beacons that can offer secure location services independent of external centralized sources such as GPS through time synchronization. The will deliver a hardware-based solution and have miners, Foam nodes provide geo-triangulation combined with a verified timestamp.

  • XY Findables sold more than 100K devices and plan to roll out a firmware upgrade to enable all the owners of these devices to become nodes/‘sentinels’ in a ‘Proof of Origin’ consensus.

  • is using a Proof of Location protocol on their own blockchain, called the Plexus™, makes it simple to verify a location claim.

  • is an open source Bluetooth server/beacon that lets Ethereum micro-computer clients proximity-detect mobile devices and write information about their location to a smart contract.

Pros

  • Trustless: Byzantine fault tolerant clock synchronization

  • Independent: Does not rely on GPS

  • Open: Anyone can utilize the network or offer utility services

  • Accountable: Economics structured to ensure honest behavior, verified with fraud proofs

  • Incentivized: Service providers remunerated for extending localization and verification zones

read more

FOAM
XYO
Platin
Platin
http://animist.io
Using Blockchain for Peer-to-Peer Proof-of-Location (research whitepaper)
FOAM blog
FOAM
Medium Foam vs Platin (sponsored)