Decentralized proof of personhood infrastructure using Personhood Credentials (PHCs) and Verifiable Relationship Credentials (VRCs) to prove real unique humans with authentic first-person trust relationships, forming a privacy-preserving decentralized trust graph. No centralized database — all credentials stored in user digital wallets. Sparked by the August 2024 Personhood Credentials paper in response to generative AI's ability to impersonate humans. First real-world pilot: Linux Kernel project (kernel.org) to prevent supply chain attacks like the Jia Tan/XZ Utils incident
LicenseOpen source (built on open standards: W3C DID, W3C VC, ToIP stack, Trust Spanning Protocol; specific implementations via LFDT components; licenses TBD)
Dev Status 🔨 WIP
Dev Status DetailEarly Implementation/Standardization (Decentralized Trust Graph Working Group (DTGWG) established as joint ToIP-DIF Working Group for standardization; Linux Kernel pilot underway; trust communities being recruited; FPNC digital cooperative being established)
OwnerFirst Person Project (multi-stakeholder collaboration led by Drummond Reed); collaborating LF projects: LF Decentralized Trust (LFDT), Trust Over IP (ToIP), Decentralized Identity Foundation (DIF), and OpenWallet Foundation (OWF); additional partners: Ayra Association, Customer Commons; planned: First Person Network Cooperative (FPNC) as governing digital cooperative
Governing Body Multi-stakeholder consortium (LF Decentralized Trust, ToIP, DIF, OpenWallet Foundation, Ayra Association and Customer Commons; planned First Person Network entity)
CountryInternational (USA-based founders, global scope)
Start Year 2024
StackImplementation-dependent (builds on Trust Over IP (ToIP) four-layer stack modeled after TCP/IP; Trust Spanning Protocol (TSP) as keystone protocol; LFDT components; zero-knowledge proof cryptography architecture being developed by LFDT CTO Hart Montgomery and Berkeley professor Dr. Sanjam Garg)
FundingLinux Foundation Decentralized Trust (LFDT) as organizational home; collaborating foundations: ToIP, DIF, OWF, Ayra Association, Customer Commons
Last Investigated Mar 9, 2026
Topology view
This tool in the centre and the things it is directly related to. Each line names the kind of relationship.
OriginsTrust infrastructure / Proof of personhood (motivated by generative AI's ability to impersonate humans defeating CAPTCHAs and robot tests; alternative to centralized biometric databases like Worldcoin; uses decentralized credential-based approach)
DatabaseDecentralized (no centralized database; credentials stored in user digital wallets; each member keeps their own set of connections; like the Internet — not owned or operated by any single company or government)
Query LanguageN/A (credential verification via Trust Spanning Protocol and standard VC presentation/verification APIs)
Data FormatsW3C Verifiable Credentials (PHCs and VRCs as new credential types within W3C VC standard; JSON-LD; zero-knowledge proof presentations)
Mobile SupportPlanned (compatible with smartphone digital wallets from Apple, Google, Samsung and other vendors)
Web SupportPlanned (browser-based verification; trust community portals)
Native AppsPlanned (any W3C VC-compatible digital wallet application)
TermsFree open infrastructure (FPNC cooperative offers services to members including sovereign cloud services, private message routing, digital wallet backup/recovery, and First Person AI agents)
FundsCollaborative project funded by member organizations and Linux Foundation infrastructure; FPNC planned as self-sustaining digital cooperative
Based OnTrust Over IP (ToIP) four-layer stack with Trust Spanning Protocol (TSP); W3C DID and W3C Verifiable Credentials standards; Personhood Credentials paper (August 2024); Verifiable Relationship Credentials paper (Ayra Association, January 2025); zero-knowledge proof cryptography
Authentication & IdentityDecentralized Identity (DIDs) with two new credential types: Personhood Credentials (PHCs — issued by any ecosystem that can attest holder is a real unique person within that ecosystem, e.g., governments, employers, universities, nonprofits) and Verifiable Relationship Credentials (VRCs — issued peer-to-peer between PHC holders to attest to verifiable first-person trust relationships, like digital business cards). Threshold-based: progressive accumulation of PHCs and VRCs makes impersonation increasingly difficult
Storage ModelUser wallet only (decentralized; each member controls their own portable subgraph of trust relationships in their own digital agents and wallets); FPNC sovereign cloud services planned for convenient messaging and data exchange without third-party surveillance
InteroperabilityHigh: any W3C VC-compatible wallet; ToIP-compatible systems; standardized via Decentralized Trust Graph Working Group (DTGWG) as joint ToIP-DIF participation Working Group; interoperability across all five layers of credential lifecycle (identifiers, credentials, wallets/agents, ecosystems, trust networks)
Data PortabilityFull portability (standard W3C VCs; wallet-to-wallet; no platform lock-in; credentials portable across all compatible ecosystems)
Governance & Decision MakingMulti-stakeholder consortium (LFDT, ToIP, DIF, OWF, Ayra Association, Customer Commons) → planned First Person Network Cooperative (FPNC): digital cooperative established for exclusive purpose of developing, growing, and maintaining First Person Network as digital public utility; any individual or trust community who joins is qualified to join FPNC; FPNC establishes governance framework policies
DID Methods SupportedMultiple methods to be supported (implementation-dependent; uses cryptographically verifiable identifiers compatible with zero-knowledge cryptography; specific DID methods being specified by DTGWG)
Key ManagementUser-controlled in digital wallets (implementation-dependent; FPNC offers digital wallet backup/recovery services to cooperative members)
Credential TypesPersonhood Credentials (PHCs — ecosystem-issued, attesting holder is real unique person in that ecosystem); Verifiable Relationship Credentials (VRCs — peer-to-peer, attesting verified first-person trust relationships); threshold-based presentation (show number of relationships exceeding certain thresholds without revealing specific relationships, similar to LinkedIn '500+ connections')
Verification MethodZero-knowledge proofs (ZKPs): can verify holder is a unique human with a certain threshold of trust relationships without learning anything more; cryptographic signature verification on credentials; no personal data shared during verification
Privacy FeaturesZero-knowledge proofs for all verification; selective disclosure; no global biometric database; no centralized credential database; local biometrics only (if used); pseudonymous threshold presentation (reveals relationship counts as thresholds, not specific relationships); no tracking or surveillance
Authentication MethodsCryptographic signatures on credentials; ZKP-based proof presentation; Trust Spanning Protocol for secure credential exchange; biometric verification is issuer-side only and local (not global database)
Revocation MechanismTo be specified by DTGWG (likely standard VC revocation mechanisms; credentials are bilateral — either party can terminate a VRC relationship)
Agent Types SupportedHumans (personhood verification); Personal AI agents (First Person AI agents offered through FPNC — act exclusively in user's interest with no vendor conflict of interest; secure delegation via credentials); trust communities (organizational entities as PHC issuers)
Wallet/Client TypesAny W3C VC-compatible digital wallet (Apple, Google, Samsung smartphone wallets; dedicated third-party wallets; FPNC cooperative wallet with backup/recovery)
Recovery MechanismsFPNC services include digital wallet backup/recovery for cooperative members; otherwise wallet-dependent
Compliance / RegulationsPrivacy-preserving by design; supports Permissionless Entry (anyone can join without central approval) and Worldwide Participation (works across all jurisdictions); no global biometric database; credentials meet W3C standards for international interoperability
Trust FrameworkDecentralized trust graph: collection of all First Person credential issuers and holders forms an interconnected web of verifiable first-person trust relationships; no central authority; trust is grounded in real-world relationships captured as cryptographic credentials; progressive trust strengthening through accumulating PHCs and VRCs from diverse ecosystems
Cost ModelFree to users (FPNC cooperative offers services at lowest cost to members; ecosystem fund for network sustainability)
Censorship ResistanceHigh (no central authority; decentralized like the Internet; credentials in user wallets; no centralized database to attack or censor; FPNC sovereign cloud services operated cooperatively without third-party terms of service)
Relationships
How this tool connects to other tools and organizations, from relationships reviewed by the OpenHaven data steward. They describe how projects connect, not how good they are.