---
id: "two-factor-authentication"
kind: "glossary-term"
title: "2FA"
language: "en"
category: "Security and abuse"
updated: "2026-10-04T14:01:23Z"
canonical: "https://tldlog.com/glossary/two-factor-authentication/"
translations:
  es: "https://tldlog.com/es/glosario/2fa/"
  de: "https://tldlog.com/de/glossar/2fa/"
  fr: "https://tldlog.com/fr/glossaire/2fa/"
  it: "https://tldlog.com/it/glossario/2fa/"
  pt-BR: "https://tldlog.com/pt/glossario/2fa/"
  ru: "https://tldlog.com/ru/glossariy/2fa/"
  zh-Hans: "https://tldlog.com/zh/cihui/2fa/"
---

# 2FA

two-factor authentication

A login that asks for a second proof besides the password, such as a code from an app or a hardware key. At a registrar it protects the account that controls a domain's settings and transfers. Whether it is offered, and whether it is required, depends on each registrar.

## related terms

- [registrar account takeover](https://tldlog.com/glossary/registrar-account-takeover/)
- [domain hijacking](https://tldlog.com/glossary/domain-hijacking/)
- [registry lock](https://tldlog.com/glossary/registry-lock/)
- [registrar lock](https://tldlog.com/glossary/registrar-lock/)
- [registrar](https://tldlog.com/glossary/registrar/)