diff --git a/README.md b/README.md
index f77a58e..c621720 100644
--- a/README.md
+++ b/README.md
@@ -724,6 +724,7 @@ Use trusted services. Using a secure, easy-to-use crypto wallet to interact with
 Be aware of most common attacks. Follow hacker websites, latest security standards, check out what [Nitrokey](https://www.nitrokey.com/) and [YubiKey](https://www.yubico.com) do and why. As a conclusion - read what is [OSINT](https://officercia.mirror.xyz/5KSkJOTgMtvgC36v1GqZ987N-_Oj_zwvGatOk0A47Ws) and [counterOSINT](https://github.com/soxoj/counter-osint-guide-en) so possible criminals won't be able to collect needed data.
 
 - [Physical Attacks](https://github.com/jlopp/physical-bitcoin-attacks/blob/master/README.md)
+- [3FA](https://www.techtarget.com/searchsecurity/definition/three-factor-authentication-3FA)
 
 Pretend to be someone ordinary. For example, follow the legend that you are just a developer of one of the games for Asian market (there are a lot of them), mimic a "average person" in everything - even in financial transactions/operations. Think like your possible enemy.