> For the complete documentation index, see [llms.txt](https://help.konnektive.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.konnektive.com/konnektive-crm/admin-setup/plugins/authentication.md).

# Authentication

- [PAAY Plugin](https://help.konnektive.com/konnektive-crm/admin-setup/plugins/authentication/paay-plugin.md): At PAAY, It's simple. We increase payment authorizations, reduce unnecessary chargebacks and seamlessly monitor for fraud.
- [Authenticating with PAAY 3DS on Landers](https://help.konnektive.com/konnektive-crm/admin-setup/plugins/authentication/paay-plugin/authenticating-with-paay-3ds-on-landers.md)
- [PAAY 3RI](https://help.konnektive.com/konnektive-crm/admin-setup/plugins/authentication/paay-3ri.md): Version 2.2 of 3D Secure (3DS) introduced Requestor-Initiated (3RI) authentications, also known as merchant-initiated authentications.