diff --git a/src/KekRozsak/AdminBundle/Resources/views/Default/groupJoinRequests.html.twig b/src/KekRozsak/AdminBundle/Resources/views/Default/groupJoinRequests.html.twig
index b11939c..0476779 100644
--- a/src/KekRozsak/AdminBundle/Resources/views/Default/groupJoinRequests.html.twig
+++ b/src/KekRozsak/AdminBundle/Resources/views/Default/groupJoinRequests.html.twig
@@ -21,7 +21,7 @@
 {% for request in group.members %}
 {% if not group.isMember(request.user) %}
 		<tr>
-			<td colspan="2">{{ request.user.displayName }}</td>
+			<td colspan="2">{{ request.user|userdataspan }}</td>
 			<td>
 				<form method="post" action="{{ path('KekRozsakAdminBundle_groupJoinRequests') }}">
 					<input type="hidden" name="user" value="{{ request.user.id }}" />
diff --git a/src/KekRozsak/AdminBundle/Resources/views/Default/manageRegs.html.twig b/src/KekRozsak/AdminBundle/Resources/views/Default/manageRegs.html.twig
index 61613da..90951e7 100644
--- a/src/KekRozsak/AdminBundle/Resources/views/Default/manageRegs.html.twig
+++ b/src/KekRozsak/AdminBundle/Resources/views/Default/manageRegs.html.twig
@@ -19,7 +19,7 @@
 		<tr>
 			<td>{{ user.username }}</td>
 			<td>{{ user.email }}</td>
-			<td>{{ user.displayName }}</td>
+			<td>{{ user|userdataspan }}</td>
 			<td>{{ user.registeredAt|date('Y-m-d H:i') }}</td>
 			<td>
 				<form method="post" action="">
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Article/view.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Article/view.html.twig
index 81331b4..d59da78 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Article/view.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Article/view.html.twig
@@ -8,6 +8,6 @@
 <p class="forras">Forrás: {{ article.source }}</p>
 {% endif %}
 {% if app.user %}
-<p class="szerzo">{{ article.createdBy.displayName }}</p>
+<p class="szerzo">{{ article.createdBy|userdataspan }}</p>
 {% endif %}
 {% endblock content %}
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Document/view.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Document/view.html.twig
index 5f23c92..1d3a600 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Document/view.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Document/view.html.twig
@@ -7,5 +7,5 @@
 	{{ document.title }}{% if document.createdBy == app.user %} [ <a href="{{ path('KekRozsakFrontBundle_documentEdit', {slug: document.slug}) }}">Szerkesztés</a> ] {% endif %}
 </h3>
 {{ document.content|raw }}
-<div class="szerzo">{{ document.createdBy.displayName }}</div>
+<div class="szerzo">{{ document.createdBy|userdataspan }}</div>
 {% endblock content %}
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Event/view.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Event/view.html.twig
index 18e8992..268962c 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Event/view.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Event/view.html.twig
@@ -5,14 +5,14 @@
 {% block content %}
 <h3>Esemény - {{ event.title }}</h3>
 <p class="esemeny-idopont">{{ event.startDate|date('Y-m-d') }} {{ event.startTime|date('H:i') }}{% if event.endDate or event.endTime %} - {% endif %}{% if event.endDate is not null %} {{ event.endDate|date('Y-m-d') }}{% endif %}{% if event.endTime is not null %} {{ event.endTime|date('H:i') }}{% endif %}</p>
-<p class="esemeny-szervezo">Az eseményt szervezi: {{ event.createdBy.displayName }}</p>
+<p class="esemeny-szervezo">Az eseményt szervezi: {{ event.createdBy|userdataspan }}</p>
 <p>
 	{{ event.description }}
 </p>
 <h4>Eddigi résztvevők</h4>
 <ul>
 {% for attendee in event.attendees %}
-	<li>{{ attendee.displayName }}</li>
+	<li>{{ attendee|userdataspan }}</li>
 {% endfor %}
 </ul>
 {% if not event.isAttending(app.user) %}
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Forum/postList.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Forum/postList.html.twig
index d431e4b..e9d0073 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Forum/postList.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Forum/postList.html.twig
@@ -33,7 +33,7 @@
 				{{ post.createdAt|date('Y-m-d') }}<br />
 				{{ post.createdAt|date('H:i') }}<br />
 				[avatar]<br />
-				{{ post.createdBy.displayName }}<br />
+				{{ post.createdBy|userdataspan }}<br />
 				Szint<br />
 				<br />
 				Tagság kezdete:<br />
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Forum/topicGroupList.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Forum/topicGroupList.html.twig
index 3221ac7..dc0ec2f 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Forum/topicGroupList.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Forum/topicGroupList.html.twig
@@ -22,7 +22,7 @@
 			<td></td>
 			<td>
 {% if topic.lastPost %}
-				{{ topic.lastPost.createdBy.displayName }}<br />
+				{{ topic.lastPost.createdBy|userdataspan }}<br />
 				{{ topic.lastPost.createdAt|date('Y-m-d H:i') }}
 {% else %}
 				&nbsp;<br />&nbsp;
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Forum/topicList.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Forum/topicList.html.twig
index b9ffe09..96c4b33 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Forum/topicList.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Forum/topicList.html.twig
@@ -20,7 +20,7 @@
 			<td></td>
 			<td>
 {% if topic.lastPost %}
-				{{ topic.lastPost.createdBy.displayName }}<br />
+				{{ topic.lastPost.createdBy|userdataspan }}<br />
 				{{ topic.lastPost.createdAt|date('Y-m-d H:i') }}
 {% else %}
 				&nbsp;<br />&nbsp;
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Group/documents.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Group/documents.html.twig
index 4f15e1d..0d467c5 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Group/documents.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Group/documents.html.twig
@@ -23,7 +23,7 @@
 			<td>[ikon]</td>
 			<td><a href="{{ path('KekRozsakFrontBundle_documentView', {slug: document.slug}) }}">{{ document.title }}</a></td>
 			<td>
-				{{ document.createdBy.displayName }}<br />
+				{{ document.createdBy|userdataspan }}<br />
 				{{ document.createdAt|date('Y-m-d H:i') }}
 			</td>
 		</tr>
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Group/join.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Group/join.html.twig
index e320f81..c73618a 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Group/join.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Group/join.html.twig
@@ -5,9 +5,9 @@
 {% block content %}
 <h3>Jelentkezés</h3>
 {% if isRequested %}
-Már jelentkeztél ebbe a csoportba ({{ group.name }}), de {{ group.leader.displayName }} még nem hagyta jóvá a belépésedet.
+Már jelentkeztél ebbe a csoportba ({{ group.name }}), de {{ group.leader|userdataspan }} még nem hagyta jóvá a belépésedet.
 {% endif %}
 {% if needApproval %}
-A csoportba való jelentkezésedről a csoport vezetőjét ({{ group.leader.displayName }}) értesítettük.
+A csoportba való jelentkezésedről a csoport vezetőjét ({{ group.leader|userdataspan }}) értesítettük.
 {% endif %}
 {% endblock content %}
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Group/list.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Group/list.html.twig
index 2d02b5f..324f7ff 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Group/list.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Group/list.html.twig
@@ -34,7 +34,7 @@
 					{% endif %}
 				{% endif %}
 			</td>
-			<td>{% if group.leader %}{{ group.leader.displayName }}{% else %}Nincs{% endif %}</td>
+			<td>{% if group.leader %}{{ group.leader|userdataspan }}{% else %}Nincs{% endif %}</td>
 		</tr>
 {% endfor %}
 	</tbody>
diff --git a/src/KekRozsak/FrontBundle/Resources/views/Group/members.html.twig b/src/KekRozsak/FrontBundle/Resources/views/Group/members.html.twig
index 151b0d9..308e476 100644
--- a/src/KekRozsak/FrontBundle/Resources/views/Group/members.html.twig
+++ b/src/KekRozsak/FrontBundle/Resources/views/Group/members.html.twig
@@ -14,7 +14,7 @@
 <ul>
 {% for user in group.members %}
 {% if group.isMember(user.user) %}
-	<li>{{ user.user.displayName }}</li>
+	<li>{{ user.user|userdataspan }}</li>
 {% endif %}
 {% endfor %}
 </ul>
diff --git a/src/KekRozsak/SecurityBundle/Controller/DefaultController.php b/src/KekRozsak/SecurityBundle/Controller/DefaultController.php
index 049121a..d8dced1 100644
--- a/src/KekRozsak/SecurityBundle/Controller/DefaultController.php
+++ b/src/KekRozsak/SecurityBundle/Controller/DefaultController.php
@@ -4,7 +4,9 @@ namespace KekRozsak\SecurityBundle\Controller;
 
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
 use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;
 use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
 use Symfony\Component\Security\Core\SecurityContext;
 use Symfony\Component\Security\Core\User\UserInterface;
 
@@ -121,4 +123,17 @@ class DefaultController extends Controller
 		return array(
 		);
 	}
+
+	/**
+	 * @Route("/profil/{id}/ajax-felhasznalo-info.{_format}", name="KekRozsakSecurityBundle_ajaxUserdata", requirements={"_format": "html"})
+	 * @Method({"GET"})
+	 * @Template()
+	 * @ParamConverter("user")
+	 */
+	public function ajaxUserdataAction(User $user)
+	{
+		return array(
+			'user' => $user,
+		);
+	}
 }
diff --git a/src/KekRozsak/SecurityBundle/Resources/config/services.xml b/src/KekRozsak/SecurityBundle/Resources/config/services.xml
index 286e69c..0501c88 100644
--- a/src/KekRozsak/SecurityBundle/Resources/config/services.xml
+++ b/src/KekRozsak/SecurityBundle/Resources/config/services.xml
@@ -8,5 +8,10 @@
 			<argument type="service" id="doctrine" />
 			<tag name="kernel.event_listener" event="security.authentication.success" />
 		</service>
+		<service id="kek_rozsak_security.twig_extension.userdataspan" class="KekRozsak\SecurityBundle\Twig\UserDataSpanExtension">
+			<argument type="service" id="service_container" />
+			<argument type="service" id="security.context" />
+			<tag name="twig.extension" />
+		</service>
 	</services>
 </container>
diff --git a/src/KekRozsak/SecurityBundle/Resources/views/Default/ajaxUserdata.html.twig b/src/KekRozsak/SecurityBundle/Resources/views/Default/ajaxUserdata.html.twig
new file mode 100644
index 0000000..4b96787
--- /dev/null
+++ b/src/KekRozsak/SecurityBundle/Resources/views/Default/ajaxUserdata.html.twig
@@ -0,0 +1,10 @@
+{# vim: ft=htmljinja
+#}
+<html>
+	<head>
+		<title>{{ user.displayName }}</title>
+	</head>
+	<body>
+		Tagság kezdete: {{ user.registeredAt|date('Y-m-d') }}
+	</body>
+</html>
diff --git a/src/KekRozsak/SecurityBundle/Twig/UserDataSpanExtension.php b/src/KekRozsak/SecurityBundle/Twig/UserDataSpanExtension.php
new file mode 100644
index 0000000..632912f
--- /dev/null
+++ b/src/KekRozsak/SecurityBundle/Twig/UserDataSpanExtension.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace KekRozsak\SecurityBundle\Twig;
+
+use Symfony\Component\Security\Core\SecurityContextInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+use KekRozsak\SecurityBundle\Entity\User;
+
+class UserDataSpanExtension extends \Twig_Extension
+{
+	protected $_securityContext;
+	protected $_serviceContainer;
+
+	public function __construct(ContainerInterface $container, SecurityContextInterface $security)
+	{
+		$this->_serviceContainer = $container;
+		$this->_securityContext = $security;
+	}
+
+	public function getFilters()
+	{
+		return array(
+			'userdataspan' => new \Twig_Filter_Method($this, 'getUserDataSpan', array('is_safe' => array('html'))),
+		);
+	}
+
+	public function getUserDataSpan(User $user)
+	{
+		if (!is_object($this->_securityContext->getToken()) || !is_object($this->_securityContext->getToken()->getUser()))
+			return '<span class="userdata-secret" title="|Felhasználó|A felhasználóink kiléte szigorúan bizalmas, csak a tagok számára elérhető.">[nem jelenhet meg]</span>';
+
+		return '<span class="userdata" rel="' . $this->_serviceContainer->get('router')->generate('KekRozsakSecurityBundle_ajaxUserdata', array('id' => $user->getId(), '_format' => 'html')) . '">' . $user->getDisplayName() . '</span>';
+	}
+
+	public function getName()
+	{
+		return 'twig_userdataspan';
+	}
+}
+