W3C Decentralized Identifiers (DIDs)

• W3C DID Core v1.0 - Decentralized Identifiers specification — globally unique, self-owned identifiers
• W3C DID v1.1 - Updated DID specification with improved verification methods
• did:key Method - Simple DID method based on expanding a cryptographic public key into a DID Document
• Microsoft ION - Decentralized DID network built on Bitcoin (Sidetree protocol)
• did:web Method - DID method using web domains for DID Document resolution
• did:ethr Method - Ethereum-based DID method for blockchain identity

Verifiable Credentials

• W3C Verifiable Credentials - Standard for cryptographically verifiable digital credentials
• W3C VC Data Model v2.1 - Latest working draft extending the VC standard (2026)
• W3C VC Implementations - Comprehensive list of VC implementations across languages
• OpenID4VP / OpenID4VCI - OpenID standards for verifiable presentations and credential issuance
• Microsoft Decentralized Identity - Reference implementations and documentation for DID/VC
• Dock - Self-sovereign identity platform for creating DIDs and Verifiable Credentials
• Decentralized Identity Foundation - Open ecosystem for decentralized identity standards and interoperability
• did-jwt-vc - Create and verify W3C Verifiable Credentials JWTs
• Credo - TypeScript framework for building decentralized identity and VC solutions (OpenWallet Foundation)
• Veridian Wallet - Open-source identity wallet using KERI and ACDC protocols

Decentralized PKI

• DPKI Overview - Decentralized PKI: replacing Certificate Authorities with blockchain-based trust
• Namecoin - Blockchain-based naming system that can serve as decentralized PKI and TLS certificate anchoring
• PKARR - Public Key Addressable Resource Records — DNS-like records signed by public keys
• KERI - Key Event Receipt Infrastructure for decentralized identifier key management

Identity & Privacy

• ZK Identity - Polygon ID — zero-knowledge identity protocol for privacy-preserving verification
• anon-aadhaar - ZK protocol to prove possession of Aadhaar (Indian ID) without revealing identity
• World ID - Privacy-preserving proof of personhood via iris biometrics with ZK proofs
• EUDI Wallet - European Digital Identity Wallet under eIDAS 2.0 regulation (2026)

Nostr-Based Identity

• NIP-05 - DNS-based identifier mapping for Nostr keys
• NIP-46: Nostr Connect - Remote key signing protocol for multi-device Nostr identity
• nsecBunker - Self-hosted Nostr key management bunker for secure remote signing