CID (Content IDentifier)

Content Identifiers (CIDs) | IPFS Docs

Learn about how content addressing works and how content identifiers, or CIDs, play a crucial role in IPFS.

CIDs: What You Need to Know and Why, Part 2 - Nick's Blog

How ATProtocol uses Content Identifiers to create a versioned, verifiable, and portable data model.

Namespaced Identifiers (NSIDs) - AT Protocol

A specification for global semantic IDs.

ipld/cid-cbor

Spec for Content Identifiers (CIDs) in CBOR for IANA CBOR Tag registry

CID Congress #2 · Luma

This is the 2nd in a series of working sessions towards making CIDs & content addressing easier to use: more deterministic, better compatibility, leaner…

DASL — Data-Addressed Structures & Links

A small set of simple, standard primitives to work on content-addressed data.

DASL — Data-Addressed Structures & Links

A small set of simple, standard primitives to work on content-addressed data.

Proposal: standard.site.declaration

Proposal: standard.site.declaration Draft for Discussion Abstract AT Protocol provides portable identity, portable content, and portable social graphs. What it currently lacks is a standard mechanism for discovering machine-readable declarations associated with digital content. Today, creators and organisations publish declarations about digital assets through websites, registries, the C2PA provenance framework, and other systems. These declarations may describe provenance, copyright ownership...

CID Congress #3 · Luma

This is the 3rd in a series of working sessions towards making CIDs & content addressing easier to use: more deterministic, better compatibility, leaner…

Evolution of AI Agent Registry Solutions: Centralized, Enterprise, and Distributed Approaches

Autonomous AI agents now operate across cloud, enterprise, and decentralized domains, creating demand for registry infrastructures that enable trustworthy discovery, capability negotiation, and identity assurance. We analyze five prominent approaches: (1) MCP Registry (centralized publication of mcp.json descriptors), (2) A2A Agent Cards (decentralized self-describing JSON capability manifests), (3) AGNTCY Agent Directory Service (IPFS Kademlia DHT content routing extended for semantic taxonomy-based content discovery, OCI artifact storage, and Sigstore-backed integrity), (4) Microsoft Entra Agent ID (enterprise SaaS directory with policy and zero-trust integration), and (5) NANDA Index AgentFacts (cryptographically verifiable, privacy-preserving fact model with credentialed assertions). Using four evaluation dimensions: security, authentication, scalability, and maintainability, we surface architectural trade-offs between centralized control, enterprise governance, and distributed resilience. We conclude with design recommendations for an emerging Internet of AI Agents requiring verifiable identity, adaptive discovery flows, and interoperable capability semantics.

Home - CIDM

The Center for Information-Development Management is an organization of information-development, training, and support managers from around the world. CIDM facilitates collaboration regarding information development among skilled managers in the information industry. ABOUT CIDM, a member organization, facilitates the sharing of information about current

ThisIsMissEm/cimd-service

An implementation of a Client ID Metadata Document Service

Lexicon Embeds Overview

ATProto’s inside out structure provides an opportunity for open, permissionless building on top of any component in the network, including its extensible data schema definition system, Lexicons. One of the opportunities this presents is users sharing their data and records with multiple apps. Those apps may be direct substitutions (different clients for microblogging say), or apps that use that data in a variety of ways, such as Popfeed an app which aggregates posts about a variety of media ty...