# What algorithm does 2FA use?

**URL:** <https://meta.discourse.org/t/what-algorithm-does-2fa-use/330478>\
**Category:** Support\
**Created:** [October 11, 2024, 6:16pm UTC](https://meta.discourse.org/t/what-algorithm-does-2fa-use/330478 "2024-10-11T18:16:47Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![supermathie](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/supermathie/32/507518_2.png) [@supermathie](https://meta.discourse.org/u/supermathie)\
**Post date:** [October 11, 2024, 7:33pm UTC](https://meta.discourse.org/t/what-algorithm-does-2fa-use/330478/2 "2024-10-11T19:33:34Z")

</div>

Yes. The equivalent oathtool command is

```plaintext
oathtool --totp -b «TOTPCODESTRING»

```

What are you using that it doesn’t recognise Discourse (presumably, it doesn’t recognise the QR code)?

Does it work with this?

 ![image](https://global.discourse-cdn.com/meta/original/4X/a/5/d/a5d1ebe292f323028963f712f9b06907f6490822.png)

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