diff --git a/WebAuthn/WebAuthn.php b/WebAuthn/WebAuthn.php
index 91aa0de..e64908b 100644
--- a/WebAuthn/WebAuthn.php
+++ b/WebAuthn/WebAuthn.php
@@ -122,9 +122,12 @@ public function prepareChallengeForRegistration($username, $userid, $crossPlatfo
     * @param string $userwebauthn the exisitng webauthn field for the user from your
     *        database (it's actaully a JSON string, but that's entirely internal to
     *        this code)
+    * @param string $device_name the optional device name given by the user during 
+    *        the registration. The device name can be request with a prompt (check
+    *        the example for an implementation)
     * @return string modified to store in the user's webauthn field in your database
     */
-    public function register($info, $userwebauthn)
+    public function register($info, $userwebauthn, $device_name = '')
     {
         if (! is_string($info)) {
             $this->oops('info must be a string', 1);
@@ -192,7 +195,11 @@ public function register($info, $userwebauthn)
         $publicKey = (object)array();
         $publicKey->key = $ao->attData->keyBytes;
         $publicKey->id = $info->rawId;
-        //log($publicKey->key);
+        $publicKey->datetime = date('c');
+        
+        if(is_string($device_name) && trim($device_name) != '') {
+            $publicKey->dname = trim($device_name);
+        }
 
         if (empty($userwebauthn)) {
             $userwebauthn = [$publicKey];
diff --git a/example/index.php b/example/index.php
index 9efe9f9..9435e8e 100644
--- a/example/index.php
+++ b/example/index.php
@@ -76,8 +76,12 @@ function getuser($username){
       if (empty($_SESSION['username'])) { oops('username not set'); }
       $user = getuser($_SESSION['username']);
 
+      /* get a device name from the user */	    
+      $device_name = (isset($_POST['dname']) && $_POST['dname'] != '') 
+	       ? $_POST['dname'] : '';
+
       /* The heart of the matter */
-      $user->webauthnkeys = $webauthn->register($_POST['register'], $user->webauthnkeys);
+      $user->webauthnkeys = $webauthn->register($_POST['register'], $user->webauthnkeys, $device_name);
 
       /* Save the result to enable a challenge to be raised agains this
          newly created key in order to log in */
@@ -269,9 +273,10 @@ function getuser($username){
 					/* activate the key and get the response */
 					webauthnRegister(j.challenge, function(success, info){
 						if (success) {
+						    var device_name = prompt('Provide a name for this device (e.g. "John\'s phone" o "Macbook Sandra")');
 							$.ajax({url: '/',
 									method: 'POST',
-									data: {register: info},
+									data: {register: info, dname: device_name},
 									dataType: 'json',
 									success: function(j){
 										$('#iregisterform,#iregisterdokey').toggle();