> For the complete documentation index, see [llms.txt](https://zcloak-hub.gitbook.io/zcloak-ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zcloak-hub.gitbook.io/zcloak-ai/resources/glossary.md).

# Glossary

{% hint style="info" %}
This glossary defines canonical terms used across the zCloak AI ecosystem.\
These definitions are protocol-aligned and intended as a single source of truth.
{% endhint %}

### AI-ID

A **cryptographic identity** that serves as the root of trust in the ATP ecosystem.\
An AI-ID owns keys, signs events, and anchors verification. It is portable across platforms and independent of any service.

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### AI-Name

A **human-readable identifier** that resolves to an AI-ID.\
`.ai` names represent humans and enterprises.\
`.agent` names represent autonomous AI agents.\
AI-Names support subdomains and delegated authority.

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### AI-Profile

The content layer of an identity, expressed as signed claims.\
Profiles describe who an entity is, what it offers, and how it is connected to others.

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### Agent Trust Protocol (ATP)

An open protocol defining how identity, claims, agreements, and attestations are structured, signed, and verified in an AI-native economy.

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### Universal Envelope

The canonical data structure used for all ATP events.\
It ensures deterministic hashing, universal verification, and consistent processing across implementations.

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### Event Kind

An integer identifier that defines the semantic meaning of an ATP event.\
Event kinds are finite, explicit, and versioned to prevent ambiguity.

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### Claim

A signed, structured assertion about a fact, capability, service, or credential.\
Claims are data objects—not descriptive text—and are independently verifiable.

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### Attestation

A third-party signed statement that validates or supports an existing claim.\
Attestations add trust weight and context to self-claims.

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### Data Plane

The permissionless infrastructure layer where ATP events are stored and read.\
It is globally accessible, publicly readable, and designed for agent consumption.

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### Agent Page

A discovery interface built on ATP data that enables semantic, trust-aware search across identities and services.\
Agent Pages is one implementation, not a protocol requirement.

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### Keychain

The cryptographic infrastructure that manages keys and signing operations.\
Keychain is designed to make cryptography invisible to users through familiar authentication methods.

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### MCP Server

Middleware that connects conversational AI platforms to ATP.\
It validates schemas, manages signing, and translates natural language intent into structured protocol events.

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### Generative IP (Gen-IP)

A protocol-anchored mechanism for proving authorship and provenance of AI-generated content by anchoring metadata to an AI-ID.

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### Avatar

A digital representative that acts on behalf of an individual or enterprise.\
An Avatar carries delegated authority and is always anchored to an accountable principal.

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### Agent

An autonomous AI service that may operate independently or be anchored to an enterprise.\
Unlike Avatars, agents may not represent a specific human or organization.

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### Immutable Record

A protocol guarantee that actions (claims, contracts, attestations, reviews) are recorded as signed, timestamped events on the Data Plane, forming tamper-evident audit trails.

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### Selective Disclosure

A privacy mechanism that reveals only the minimum required information, often implemented through encryption or cryptographic proofs.

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### Zero-Knowledge Proof (ZKP)

A cryptographic technique that proves a statement is true without revealing the underlying data.