# How Passwordless Works

DevFeed: [How Passwordless Works](<https://devfeed.tech/articles/how-passwordless-works-29676.md>)

Original publisher: [Read original article](<https://goteleport.com/blog/how-passwordless-works/>)

Author: alan.parra@goteleport.com (Alan Parra)

Published: 2022-08-04T00:00:00Z

Content type: tutorial

Language: en

Sources: [Teleport](<https://devfeed.tech/sources/teleport.md>)

Topics: [WebAuthn](<https://devfeed.tech/topics/webauthn.md>), [Authentication](<https://devfeed.tech/topics/authentication.md>), [passwords](<https://devfeed.tech/topics/passwords.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>), [client](<https://devfeed.tech/topics/client.md>), [Security](<https://devfeed.tech/topics/security.md>), [browser](<https://devfeed.tech/topics/browser.md>), [Server](<https://devfeed.tech/topics/server.md>)

Tags: [authentication](<https://devfeed.tech/tags/authentication.md>), [browser](<https://devfeed.tech/tags/browser.md>), [password](<https://devfeed.tech/tags/password.md>), [security](<https://devfeed.tech/tags/security.md>), [server](<https://devfeed.tech/tags/server.md>), [specifications](<https://devfeed.tech/tags/specifications.md>), [web-authentication](<https://devfeed.tech/tags/web-authentication.md>)

## AI overview

This tutorial explains passwordless and usernameless authentication, focusing on how WebAuthn uses a challenge-response protocol involving an authenticator, a web browser, and a server. It also introduces related FIDO2 specifications and discusses the approach's user-experience and security trade-offs.

## Source excerpt

Learn how passwordless authentication works and how it's built using WebAuthn.