diff --git a/controller/AppController.py b/controller/AppController.py
index 7b3376a..fcd96ee 100644
--- a/controller/AppController.py
+++ b/controller/AppController.py
@@ -3,6 +3,7 @@ from model.Protocol import *
 import traceback
 import os.path
 
+
 class AppController:
     def __init__(self, parser):
         self.parser = parser
@@ -19,8 +20,8 @@ class AppController:
         print("[AppController::on_sign]")
         try:
             if not self.connection.is_connected:
-               print("[AppController::on_sign] connecting ... calling UnicastConnection::connect")
-               self.connect(host, port, tls)
+                print("[AppController::on_sign] connecting ... calling UnicastConnection::connect")
+                self.connect(host, port, tls)
             if not register:
                 message = self.parser.build_SIGNIN(login, passw)
             else:
@@ -41,7 +42,7 @@ class AppController:
     def get_filename_size_from_item(self, item):
         tokens = item.split('!')
         if len(tokens) == 2:
-            return (tokens[0],tokens[1])
+            return (tokens[0], tokens[1])
         else:
             return None
 
@@ -117,7 +118,7 @@ class AppController:
         elif message_id == Protocol.PARSE_REMOVEFILEERROR:
             self.show_message("Error while erasing file.", True)
 
-    def show_message(self,message, is_error):
+    def show_message(self, message, is_error):
         self.window_controller.show_message(message, is_error)
 
     def connect(self, host, port, tls):
diff --git a/ffe.labo.swilabus.com.p12 b/ffe.labo.swilabus.com.p12
new file mode 100644
index 0000000..98ca601
Binary files /dev/null and b/ffe.labo.swilabus.com.p12 differ