10 KiB
| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Authentication - Glossary | MDN | 1/3 | https://developer.mozilla.org/en-US/docs/Glossary/Authentication | reference | web, html, css, javascript, documentation | 2026-05-05T05:24:37.817051+00:00 | kb-cron |
MDN HTML HTML: Markup language
HTML reference
HTML guides
Markup languages
CSS reference
CSS guides
Layout cookbook
JavaScriptJS JavaScript: Scripting language
JS reference
JS guides
Web APIs Web APIs: Programming interfaces
Web API reference
Web API guides
- Using the Web animation API
- Using the Fetch API
- Working with the History API
- Using the Web speech API
- Using web workers
Technologies
Topics
Learn Learn web development
Frontend developer course
- Getting started modules
- Core modules
- MDN Curriculum
- Check out the video course from Scrimba, our partner
Learn HTML
Learn CSS
Learn JavaScript
Tools Discover our tools
About Get to know MDN better
Authentication
Authentication is in general the process of proving that some fact is genuine. More specifically, in web security, it is the process of verifying the claimed identity of some entity, such as a user. This then makes it possible to decide whether to grant the user the access that they are requesting, such as being signed into a particular account. Authentication is typically performed by having a user present a user identifier along with a credential, such as a password, a one-time code, or an assertion signed with a private key. The system then checks the binding between the user identifier and the credential, so it can decide whether or not to authenticate the user. Types of authentication information, also called authentication factors , are commonly presented in three categories:
- Something the user knows, such as a password.
- Something the user has, such as a phone.
- Something the user is, such as a thumbprint.
Multi-factor authentication (MFA) systems require the user to provide more than one factor: for example, a password combined with a one-time code generated using an authenticator app on the user's phone.