{
  "type": "option",
  "name": "Coordinated phase-2 ceremony platforms",
  "slug": "phase-2-platforms",
  "section": {
    "id": "ceremony",
    "number": "04",
    "title": "Running or reusing a trusted setup",
    "url": "https://zkpick.com/ceremony/"
  },
  "url": "https://zkpick.com/ceremony/phase-2-platforms/",
  "markdown": "https://zkpick.com/md/ceremony/phase-2-platforms.md",
  "category": "Coordinated ceremony platform",
  "summary": "Coordinated phase-2 ceremony platforms: Coordinated ceremony platform. Coordinator-run platforms that automate queueing, timeouts, per-contribution verification and attestation publication across multiple circuits at once, with browser and CLI contribution. Maturity: Production-used, maintenance mode. Maintained by: Ethereum Foundation Privacy & Scaling Explorations (p0tion, DefinitelySetup); maintenance mode. Choose it when: Teams needing an open, browser-accessible phase-2 ceremony with many contributors, who do not want to build queueing and attestation plumbing themselves.",
  "description": "Coordinator-run platforms that automate queueing, timeouts, per-contribution verification and attestation publication across multiple circuits at once, with browser and CLI contribution. The leading open platform states it is no longer actively developed, which is the most decision-relevant fact here: adopting it means owning it. Third-party coordination does buy something real — it constrains the project's ability to manipulate the ceremony software — but not its control of the circuit, the phase-1 artefact chosen, or the deployed verifying key.",
  "notes": [],
  "sections": [],
  "strengths": [
    "Removes most of the coordination work, which is where ceremonies usually fail",
    "Real production track record across multiple independent projects",
    "Per-contribution verification and timeouts are enforced by the platform, so a stalled or malformed contribution cannot silently block or weaken the chain",
    "Attestations published automatically rather than collected by hand"
  ],
  "tradeoffs": [
    "The leading open platform is explicitly in maintenance mode — plan for self-hosting and self-maintenance",
    "Requires billed cloud infrastructure, so the coordinator carries real cost and operational obligations",
    "Cloud-hosted coordination concentrates liveness and censorship risk in one operator",
    "Phase 2 only; not a phase-1 solution"
  ],
  "bestFit": "Teams needing an open, browser-accessible phase-2 ceremony with many contributors, who do not want to build queueing and attestation plumbing themselves.",
  "maintainers": "Ethereum Foundation Privacy & Scaling Explorations (p0tion, DefinitelySetup); maintenance mode",
  "maturity": "Production-used, maintenance mode",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "source": "https://github.com/privacy-ethereum/p0tion",
  "facts": [],
  "relatedFailureModes": [],
  "sources": [
    {
      "title": "p0tion — phase-2 ceremony toolkit (in maintenance mode)",
      "url": "https://github.com/privacy-ethereum/p0tion",
      "kind": "tool"
    }
  ],
  "updated": "2026-09-12",
  "version": "1.3",
  "canonical": "https://zkpick.com/ceremony/phase-2-platforms/",
  "authors": [
    "MarketComp"
  ]
}