diff --git a/lib/Alchemy/Phrasea/Authentication/ACLProvider.php b/lib/Alchemy/Phrasea/Authentication/ACLProvider.php
new file mode 100644
index 0000000000..e3aa66ebef
--- /dev/null
+++ b/lib/Alchemy/Phrasea/Authentication/ACLProvider.php
@@ -0,0 +1,92 @@
+<?php
+
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Alchemy\Phrasea\Authentication;
+
+use Alchemy\Phrasea\Model\Entities\User;
+use Silex\Application;
+
+class ACLProvider
+{
+    /**
+     * An array cache for ACL's.
+     *
+     * @var array
+     */
+    private static $cache = array();
+
+    private $app;
+
+    public function __construct(Application $app)
+    {
+        $this->app = $app;
+    }
+
+    /**
+     * Gets ACL for user.
+     *
+     * @param User $user
+     *
+     * @return \ACL
+     */
+    public function get(\User_Adapter $user)
+    {
+        if (null !== $acl = $this->fetchFromCache($user)) {
+            return $acl;
+        }
+
+        return $this->fetch($user);
+    }
+
+    /**
+     * Purges ACL cache
+     */
+    public function purge()
+    {
+        self::$cache = array();
+    }
+
+    /**
+     * Fetchs ACL from cache for users.
+     *
+     * @param User $user
+     *
+     * @return null || \ACL
+     */
+    private function fetchFromCache(\User_Adapter $user)
+    {
+        return $this->hasCache($user) ? self::$cache[$user->get_id()] : null;
+    }
+
+    /**
+     * Tells whether ACL for user is already cached.
+     *
+     * @param User $user
+     *
+     * @return boolean
+     */
+    private function hasCache(\User_Adapter $user)
+    {
+        return array_key_exists($user->get_id(), self::$cache) && self::$cache[$user->get_id()] instanceof \ACL;
+    }
+
+    /**
+     * Saves user's ACL in cache and returns it.
+     *
+     * @param User $user
+     *
+     * @return \ACL
+     */
+    private function fetch(\User_Adapter $user)
+    {
+        return self::$cache[$user->get_id()] = new \ACL($user, $this->app);
+    }
+}
diff --git a/lib/Alchemy/Phrasea/Core/Provider/PhraseanetServiceProvider.php b/lib/Alchemy/Phrasea/Core/Provider/PhraseanetServiceProvider.php
index 9ac3896522..9f607969eb 100644
--- a/lib/Alchemy/Phrasea/Core/Provider/PhraseanetServiceProvider.php
+++ b/lib/Alchemy/Phrasea/Core/Provider/PhraseanetServiceProvider.php
@@ -11,6 +11,7 @@
 
 namespace Alchemy\Phrasea\Core\Provider;
 
+use Alchemy\Phrasea\Authentication\ACLProvider;
 use Alchemy\Phrasea\Security\Firewall;
 use Silex\Application as SilexApplication;
 use Silex\ServiceProviderInterface;
@@ -37,6 +38,10 @@ class PhraseanetServiceProvider implements ServiceProviderInterface
 
             return $events;
         });
+
+        $app['acl'] = $app->share(function(SilexApplication $app) {
+            return new ACLProvider($app);
+        });
     }
 
     public function boot(SilexApplication $app)
diff --git a/lib/Alchemy/Phrasea/Model/Entities/User.php b/lib/Alchemy/Phrasea/Model/Entities/User.php
index 42d724c54f..322e22908e 100644
--- a/lib/Alchemy/Phrasea/Model/Entities/User.php
+++ b/lib/Alchemy/Phrasea/Model/Entities/User.php
@@ -287,11 +287,6 @@ class User
      **/
     private $notificationSettings;
 
-    /**
-     * @var \ACL
-     */
-    private $acl;
-
     /**
      * @var ArrayCollection
      */
@@ -1010,20 +1005,6 @@ class User
         return $this;
     }
 
-    /**
-     * @param Application $app
-     *
-     * @return \ACL
-     */
-    public function ACL(Application $app)
-    {
-        if (!$this->acl instanceof \ACL) {
-            $this->acl = new \ACL($this, $app);
-        }
-
-        return $this->acl;
-    }
-
     /**
      * @return boolean
      */
diff --git a/tests/Alchemy/Tests/Phrasea/Authentication/ACLProviderTest.php b/tests/Alchemy/Tests/Phrasea/Authentication/ACLProviderTest.php
new file mode 100644
index 0000000000..2c2fdc4310
--- /dev/null
+++ b/tests/Alchemy/Tests/Phrasea/Authentication/ACLProviderTest.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Alchemy\Tests\Phrasea\Authentication;
+
+use Alchemy\Phrasea\Application;
+use Alchemy\Phrasea\Authentication\ACLProvider;
+
+class ACLProviderTest extends \PhraseanetPHPUnitAbstract
+{
+    public function testGetACL()
+    {
+        $acl = self::$DI['app']['acl']->get(self::$DI['user']);
+
+        $this->assertInstanceOf('\ACL', $acl);
+    }
+}
diff --git a/tests/Alchemy/Tests/Phrasea/Core/Provider/PhraseanetServiceProviderTest.php b/tests/Alchemy/Tests/Phrasea/Core/Provider/PhraseanetServiceProviderTest.php
new file mode 100644
index 0000000000..b88a0b1813
--- /dev/null
+++ b/tests/Alchemy/Tests/Phrasea/Core/Provider/PhraseanetServiceProviderTest.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace Alchemy\Tests\Phrasea\Core\Provider;
+
+/**
+ * @covers Alchemy\Phrasea\Core\Provider\FeedServiceProvider
+ */
+class PhraseanetServiceProviderTest extends ServiceProviderTestCase
+{
+    public function provideServiceDescription()
+    {
+        return array(
+            array(
+                'Alchemy\Phrasea\Core\Provider\PhraseanetServiceProvider',
+                'phraseanet.appbox',
+                '\appbox'
+            ),
+            array(
+                'Alchemy\Phrasea\Core\Provider\PhraseanetServiceProvider',
+                'phraseanet.registry',
+                '\registry'
+            ),
+            array(
+                'Alchemy\Phrasea\Core\Provider\PhraseanetServiceProvider',
+                'firewall',
+                'Alchemy\Phrasea\Security\Firewall'
+            ),
+            array(
+                'Alchemy\Phrasea\Core\Provider\PhraseanetServiceProvider',
+                'events-manager',
+                '\eventsmanager_broker'
+            ),
+            array(
+                'Alchemy\Phrasea\Core\Provider\PhraseanetServiceProvider',
+                'acl',
+                'Alchemy\Phrasea\Authentication\ACLProvider'
+            )
+        );
+    }
+}