> ## Documentation Index
> Fetch the complete documentation index at: https://docs.terminal3.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Frequently Asked Questions

> Common questions about DIDs, privacy, and agents in T3N.

## What is a DID?

A **Decentralized Identifier (DID)** is a globally unique identifier
that you control, rather than a traditional account owned by a single
company. In T3N, `did:t3n:` identifiers are used to represent users,
agents, and other entities with cryptographic keys and permissions
attached. For the formal specification, see the W3C standard
[Decentralized Identifiers (DIDs) v1.1](https://www.w3.org/TR/did-1.1/).

## How is my data kept private?

Your data is encrypted and only processed inside
**Trusted Execution Environments (TEEs)**. This means operators and
infrastructure providers cannot see your raw data, even while it is
being used by agents or APIs. For more on TEEs at the hardware level,
see
[Intel® Trust Domain Extensions (Intel® TDX)](https://www.intel.com/content/www/us/en/developer/tools/trust-domain-extensions/overview.html).

## What is MCP?

The **Model Context Protocol (MCP)** is an open standard for connecting
AI applications to external tools and data sources—think of it as a
standardized way for agents to call APIs, databases, and workflows.
You can read the official introduction at
[modelcontextprotocol.io](https://modelcontextprotocol.io/docs/getting-started/intro).

## What is an Agent?

An **Agent** is an AI-powered or automated service that can act on your
behalf inside the T3N network. Agents only get access to data and
actions that you explicitly authorize, and all activity is tied back
to your DID.