privacyIDEA is a two factor authentication system which is multi-tenency- and multi-instance-capable.

Thus it is meant to replace classical proprietary two factor authentication systems such as RSA SecurID or Vasco.

[4] It is also possible to login with a second factor to Windows desktops using a privacyIDEA Credential Provider.

[5] privacyIDEA runs on-premises as a web application on a Linux system.

privacyIDEA supports a wide variety of authentication devices.