Try Hardware Security SDK in your app today.
Security Keys

FIDO2 Security Keys

Passwordless login is supported by modern FIDO2 Security Keys, such as the YubiKeys 5 series as well as Solokeys. Security Keys can be directly connected over USB-C and NFC. USB-A keys require an additional USB OTG cable.

NFC Sweetspot

Each smartphone has a different sweetspot where the NFC connection works best. Our Hardware Security SDK shows this spot to make it easy for the user to place their NFC Security Key.
Hardware Security SDK

No Additional Cloud Services
No Google Play Services

We are not selling yet another SaaS login solution. Our SDK is a standard-compliant clean-room implementation that works with any FIDO server. In contrast to Google's FIDO APIs, our SDK works without Google Play Services. Thus, it also works in countries where phones do not ship with Google Play.

Standards Compliant

The FIDO Alliance does not certify native FIDO clients. However, our SDK has been successfully tested with a wide variety of FIDO authenticators. It has been implemented by carefully following the FIDO standards.

Hardware Security SDK Client to Authenticator Protocol 2 (CTAP2)
FIDO2 Artifact WebAuthn Specification
Hardware Security SDK

Add WebAuthn/FIDO2 to Your App

protected void onCreate(Bundle savedInstanceState) {

    WebView webView = findViewById(;

    WebViewWebauthnBridge webViewWebauthnBridge = WebViewWebauthnBridge
            .createInstanceForWebView(this, webView);

    webView.setWebViewClient(new WebViewClient() {

        public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
            webViewWebauthnBridge.delegateShouldInterceptRequest(view, request);
            return super.shouldInterceptRequest(view, request);

        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
            webViewWebauthnBridge.delegateOnPageStarted(view, url, favicon);


Complete Guide

Technical Support

If you ever need help, you get direct access to the developers and cryptographers who built the product. Whether you have questions getting started or you want to know how to best integrate SDK features into your app, we’re here to help you find a solution.