Why do you get this message?
The service provider you are logging into requires strong authentication with a second factor, like the Tiqr app or a Yubikey token.
The error occurs when you do not yet have registered a second factor. Or, if you did register one, but the service requires a token with a higher assurance level than the token you registered.
Now what?
You can register your second factor via SURFsecureID. The proces can be started on https://sa.surfconext.nl/. There you can also see which token you already registered.
More information about using SURFsecureID can be found at Using SURFsecureID.
If you are trying to log into a SURF service with an administrative role, (SURFdomeinen, Network Dashboard, SURFdashboard or SURFopzichter), see SURFsecureID voor toegang tot SURF diensten.