Mutual sensing proof
Participants co-sign each other’s presence through rotating Bluetooth Low Energy bursts, multiplying the cost of spoofing beyond QR handouts or GPS fakes. This lowers the verification cost for community actions.
Open protocol collective
Turning Verifiable IRL Activities into Portable Trust and Fair Rewards.
The Greeting is an open protocol that validates real-world contributions—like cleaning a park or attending a town hall—without centralized gatekeepers. By using mutual proximity sensing to prove "who was there", we enable the instant, fair distribution of valuable incentives and build a durable trust score based on your actual impact on the community.
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Mutual sensing × Verifiable Credentials × Zero-Knowledge
Why we build
A greenfield protocol turning embodied participation into portable trust without corporate custody.
Self-sovereign records
Every verified encounter becomes a W3C Verifiable Credential that lives with the individual. These records serve as the foundation for a new trust score, allowing users to build a portable reputation based on their real-world contributions.
Democratic incentives
Community labs, civic groups, and mobility providers can distribute valuable incentives fairly. By lowering verification costs, we enable a sustainable economic cycle where contributions to the earth and community are properly rewarded.
Privacy-first verification
Zero-knowledge proofs reveal only the necessary claim—such as “five trusted contributions this quarter”—while the underlying encounter graph remains private.
Integrity you can audit
Consensus filtering, timestamped anchors, and public hashing make after-the-fact tampering visible to anyone reviewing the record.
Open collective governance
Protocol components ship as public goods. Developers, organizers, and mobility partners co-evolve the stack through transparent stewardship.
How it works
A seamless flow from physical action to digital value.
- Mutual Discovery: Participants' smartphones exchange rotating, privacy-preserving signals via Bluetooth Low Energy to recognize nearby peers.
- Co-signed Proof: When a quorum of devices confirms presence at the same time and place, they cryptographically co-sign an "encounter log," creating a Proof of Activity without a central observer.
- Trust Anchor: The protocol filters these logs for authenticity and anchors a hash on-chain, ensuring the record is tamper-proof and permanent.
- Value Distribution: Verified proofs automatically trigger smart contracts or issuance services to deliver rewards—like coffee coupons or community tokens—directly to the participant's wallet.
- Portable Reputation: Over time, these accumulated proofs build a private, self-sovereign "Trust Score" that users can selectively disclose to access new opportunities.
Ecosystem Vision
Infrastructure that lets mobility, civic, and brand ecosystems reward meaningful action for a sustainable earth.
- City services, cultural programs, and mobility pilots recognise verified involvement with priority access and tailored rewards.
- Community organizers run fair, low-cost distributions without collecting personal data they cannot safely store.
- Enterprises weave IRL contribution into loyalty, CSR, and workforce programs while keeping user ownership intact.
- Open APIs and SDKs invite developers to build dashboards, analytics, and governance tools atop the core protocol.
The team
Two builders carrying the protocol forward as a voluntary collective.