Suggest an alternative to

FIDO2

FIDO2 toolbox in Java and X-FIDO JavaCard applet

Why do you think that https://github.com/vzakharchenko/keycloak-radius-plugin is a good alternative to FIDO2

A URL to the alternative repo (e.g. GitHub, GitLab)

Here you can share your experience with the project you are suggesting or its comparison with FIDO2. Optional.

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