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1---
2tags:
3 - DID
4 - ATProtocol
5 - specification
6 - W3C
7 - article
8link: https://w3c-ccg.github.io/did-method-web/
9published: 2024-07-31
10---
11Unofficial Draft 31 July 2024
12## Abstract
13
14DIDs that target a distributed ledger face significant practical challenges in bootstrapping enough meaningful trusted data around identities to incentivize mass adoption. We propose a new DID method using a web domain's existing reputation.
15
16## ATProto
17
18Supported by [[ATProtocol]], with some constraints:
19
20> `did:web`, which is a W3C standard based on HTTPS (and DNS). The identifier section is a hostname. This method is supported in atproto to provide an independent alternative to `did:plc` [[DID PLC]]. The method is inherently tied to the domain name used, and does not provide a mechanism for migration or recovering from loss of control of the domain name. In the context of atproto, only hostname-level `did:web` DIDs are supported: path-based DIDs are not supported. The same restrictions on top-level domains that apply to handles (eg, no `.arpa`) also apply to `did:web` domains. The special `localhost` hostname is allowed, but only in testing and development environments. Port numbers (with separating colon hex-encoded) are only allowed for `localhost`, and only in testing and development.
21> [atproto.com/specs/did](https://atproto.com/specs/did)