Cybersecurity
2FA (Two-Factor Authentication)
A login system that requires a password plus a second proof of identity (authenticator code, hardware key, or SMS) — dramatically reducing account takeover risk.
Updated · GACS — Global Anti-Crime & Safety
Cite this definition as gacs.app/glossary/2fa-two-factor-authentication.
Learn more on GACS
Source: GACS — Global Anti-Crime & Safety · Published by the GACS Research Team · Updated October 21, 2026
Cite this page: GACS (2026). 2FA (Two-Factor Authentication) — GACS Glossary. https://gacs.app/glossary/2fa-two-factor-authentication · Record ID GACS-glossary-2fa-two-factor-authentication
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Authoritative sources
Independent primary sources used to check and corroborate the guidance on this page.
FBI Internet Crime Complaint Center (IC3)Official US channel for reporting internet-enabled fraud and cybercrime.
US Federal Trade Commission — ReportFraudConsumer fraud reporting and published enforcement data.
UK Report FraudUK national reporting centre for fraud and cybercrime.
Canadian Anti-Fraud CentreCanada's central repository for fraud reports and scam alerts.