User:Cel

Charles E. Lehner

W3C Invited Expert

W3C Participation

Credentials Community Group (CCG)

• Member since 2020-09-22
• Ethereum EIP-712 Signature 2021 - co-editor / work item co-owner
• The did:pkh method - co-author / work item co-owner
• JSON Web Signature 2020 - co-editor
• Verifiable Driver's License Vocabulary - work item co-owner
• vc-jwt-interop (proposed) work item co-owner
• Minor contributions to work items: The did:key Method, Verifiable Presentation Request Specification, VC API Test Suite, The Security Vocabulary, Verifiable Credentials API, Meeting transcripts & tools, Ed25519 Signature 2020.

Decentralized Identifier Working Group (DID WG)

• Member since 2020-10-25
• Minor contributions to deliverables: DID Core Specification, DID Implementation Guide, DID Specification Registries, DID Test Suite, DID Method Rubric.

Verifiable Credentials Working Group (VCWG)

• Member from 2020-12-15 to 2023-05-25
• Minor contributions to VC Data Model and VC Test Suite.

JSON-LD Working Group

• JSON-LD API - minor contribution

Social Web Incubator Community Group (SocialCG)

• Member since 2022-10-26

TPAC

• 2022: Attended various sessions; scribed a few times.

Non-W3C Activity

Decentralized Identity Foundation (DIF)

• JsonWebSignature2020 Test Suite - minor contributions. Added RSA key.
• Minor contributions to Universal Resolver, DID Registration, and Sidetree.

Chain Agnostic Standards Alliance (CASA)

• Chain Agnostic Improvement Proposals (CAIPs) - minor contributions

Secure Scuttlebutt Consortium (SSBC)

• SSB DID Resolver - author
• SSB DID method (did:ssb) - author/editor
• ssb-did-key - author
• Author/contributor to git-ssb, ssb-npm, patchfoo, sbotc, and other SSB projects

Spruce Systems, Inc. (2020-2022)

• DIDKit - co-author/maintainer
• ssi - co-author/maintainer
• did:did method - co-author/editor
• TezosMethod2021 Signing String Explainer - contributor
• CACAO-ZCAP (implementation) - author/editor

Presentations

• Intro to W3C VCs and DIDs (slides), Aaron Swartz Day 2022
• Verifiable Credentials and Decentralized Identifiers with DIDKit, FOSDEM 2022
• Secure Scuttlebutt: Peer­-to­-peer Collaboration and Community Infrastructure, LibrePlanet 2020; Internet Identity Workshop IIWXXXI
• Lightning Talks: New Discoveries: Scuttlebutt App Demos, Decentralized Web Summit 2018

Other info

• Personal homepage
• W3C user page (private)
• IRC nick: cel on W3C IRC, Libera.Chat, and tilde.chat
• Matrix id: @cel:hope.net / @cel:fosdem.org
• Fediverse (ActivityPub): @cel@celehner.com (Epicyon), @cel@woodbine.nyc (Mastodon), @cel@toobnix.org (PeerTube)