+<h1>Challenge-Response Provider</h1>
+<h2>using Yubico\'s <em>Yubikey Neo</em> NFC token</h2>
+<p>
+This application does not do anything itself, it provides a way for other
+applications to use the NFC token for encryption and authentication purposes.
+</p>
+<p>
+You need to configure one of the slots in the <em>Neo</em> to run in CHAL-HMAC
+mode, like this:
+</p>
+<pre>
+ ykpersonalize -2 -ochal-resp -ochal-hmac -ohmac-lt64 -oserial-api-visible
+</pre>
+<p>
+The slot number that was used in the above command must be selected below:
+</p>