> For the complete documentation index, see [llms.txt](https://epochsec.gitbook.io/daily-activities-best-practices/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://epochsec.gitbook.io/daily-activities-best-practices/staying-safe-in-crypto/using-2fa.md).

# Using 2FA

* Two Factor Authentication software and hardware device require a second authentication, once you authenticate with your password to different applications.
* Google Authenticator is an example of a software 2FA application
* Yubikey is an example of a hardware 2FA device. This is arguably more secure. However, using either one is better than not using 2FA.
* Suggestion: Do not use SMS two factor authentication when possible to avoid.
* With 2FA + Sim Lock, you are greatly decreasing your odds of being attacked or compromised.