---
title: "UCAN"
description: "User Controlled Authorization Network (UCAN) Specification"
url: "https://hugodias.me/projects/ucan/"
lang: "en"
author: "Hugo Dias"
datePublished: "2022-04-04T00:00:00.000Z"
dateModified: "2022-04-04T00:00:00.000Z"
repository: "https://github.com/ucan-wg/spec"
website: "https://github.com/ucan-wg"
---

# UCAN

Apr 4, 2022 • 1 min read

![UCAN logo.](/_astro/ucan.D9KrgmfK_Z21tnIU.webp)

UCAN

User Controlled Authorization Networks (UCANs) are decentralized, capabilities model authorization tokens.

UCAN is a trustless, secure, local-first, user-originated authorization and revocation scheme. UCAN is designed to be very flexible: you can use it offline, online, fully P2P, federated, or with central servers.

Please see the [specs](https://github.com/ucan-wg/spec/) for more detail on implementation.

If you’re interested in contributing to the development of UCANs, check out the [GitHub Discussions](https://github.com/ucan-wg/spec/discussions). Introduce yourself and your project, and what you’re looking to do with UCANs, and join the next community call to meet others. The [Discord server](https://discord.gg/zSfgeHhKxA) is low volume and high signal, feel free to drop in.

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