Important Notice - Forums is archived
To simplify things and help our users to be more productive, we have archived the current forum and focus our efforts on helping developers on Stack Overflow. You can post new questions on Stack Overflow or join our Discord channel.

Vaadin lets you build secure, UX-first PWAs entirely in Java.
Free ebook & tutorial.
FIDO U2F with Vaadin
Hi
It is quite straightforward to implement U2F with Vaadin. You need to implement JavaScriptExtension and use yubico-java-client library. Here is an example:
https://github.com/bubblecloud/ilves/blob/master/ilves-vaadin/src/main/java/org/bubblecloud/ilves/security/U2fConnector.java
Here is a demo (you need to register and activate the U2F from your profile):
https://ilves.herokuapp.com/
In case you do not have U2F dongle yet you can get one from Yubico:
https://www.yubico.com/github-special-offer/
Happy site securing :)
Cheers,
Tommi