diff --git a/ZScoDoc.py b/ZScoDoc.py
index 59a26a6..d7f709a 100644
--- a/ZScoDoc.py
+++ b/ZScoDoc.py
@@ -273,10 +273,26 @@ class ZScoDoc(ObjectManager, PropertyManager, RoleManager, Item, Persistent, Imp
 
     security.declareProtected("View", "list_depts")
 
-    def list_depts(self, REQUEST=None):
-        """List departments folders
-        (returns a list of Zope folders containing a ZScolar instance)
+    def list_depts(self, viewable=True, format=None, REQUEST=None):
+        """List departments
+        If viewable, list only depts viewable the current user.
         """
+        authuser = REQUEST.AUTHENTICATED_USER
+        viewable = int(viewable)
+        return scu.sendResult(
+            REQUEST,
+            [
+                d.id
+                for d in self._list_depts()
+                if (not viewable) or authuser.has_permission(ScoView, d.Scolarite)
+            ],
+            name="depts",
+            format=format,
+        )
+
+    def _list_depts(self, REQUEST=None):  # not published
+        # List departments folders
+        # (returns a list of Zope folders containing a ZScolar instance)
         folders = self.objectValues("Folder")
         # select folders with Scolarite object:
         r = []
@@ -327,7 +343,7 @@ class ZScoDoc(ObjectManager, PropertyManager, RoleManager, Item, Persistent, Imp
         if e:
             return e
 
-        if not force and DeptId not in [x.id for x in self.list_depts()]:
+        if not force and DeptId not in [x.id for x in self._list_depts()]:
             raise ValueError("nom de departement invalide")
 
         self.manage_delObjects(ids=[DeptId])
@@ -391,7 +407,7 @@ class ZScoDoc(ObjectManager, PropertyManager, RoleManager, Item, Persistent, Imp
     def index_html(self, REQUEST=None, message=None):
         """Top level page for ScoDoc"""
         authuser = REQUEST.AUTHENTICATED_USER
-        deptList = self.list_depts()
+        deptList = self._list_depts()
         self._fix_users_folder()  # fix our exUserFolder
         isAdmin = not self._check_admin_perm(REQUEST)
         try:
@@ -406,7 +422,7 @@ class ZScoDoc(ObjectManager, PropertyManager, RoleManager, Item, Persistent, Imp
         # Si l'URL indique que l'on est dans un folder, affiche page login du departement
         try:
             deptfoldername = REQUEST.URL0.split("ScoDoc")[1].split("/")[1]
-            if deptfoldername in [x.id for x in self.list_depts()]:
+            if deptfoldername in [x.id for x in self._list_depts()]:
                 return self.index_dept(deptfoldername=deptfoldername, REQUEST=REQUEST)
         except:
             pass
@@ -453,7 +469,7 @@ class ZScoDoc(ObjectManager, PropertyManager, RoleManager, Item, Persistent, Imp
                 dest_folder = "/Scolarite"
             else:
                 dest_folder = ""
-            for deptFolder in self.list_depts():
+            for deptFolder in self._list_depts():
                 if authuser.has_permission(ScoView, deptFolder.Scolarite):
                     link_cls = "link_accessible"
                 else:
@@ -868,7 +884,7 @@ subversion: %(svn_version)s
             % self.absolute_url(),
         ]
 
-        deptList = [x.id for x in self.list_depts()]  # definis dans Zope
+        deptList = [x.id for x in self._list_depts()]  # definis dans Zope
         deptIds = set(self._list_depts_ids())  # definis sur le filesystem
         existingDepts = set(deptList)
         addableDepts = deptIds - existingDepts
@@ -897,7 +913,7 @@ subversion: %(svn_version)s
 <select name="DeptId">
               """
             )
-            for deptFolder in self.list_depts():
+            for deptFolder in self._list_depts():
                 H.append(
                     '<option value="%s">%s</option>' % (deptFolder.id, deptFolder.id)
                 )
@@ -932,7 +948,7 @@ subversion: %(svn_version)s
         """Returns the dept id (eg "GEII") of an etud (identified by etudid, INE or NIP in REQUEST).
         Warning: This function is inefficient and its result should be cached.
         """
-        depts = self.list_depts()
+        depts = self._list_depts()
         depts_etud = []  # liste des depts où l'etud est defini
         for dept in depts:
             etuds = dept.Scolarite.getEtudInfo(REQUEST=REQUEST)
diff --git a/sco_find_etud.py b/sco_find_etud.py
index 7038a16..1abf2fb 100644
--- a/sco_find_etud.py
+++ b/sco_find_etud.py
@@ -276,7 +276,7 @@ def search_etud_in_accessible_depts(context, expnom=None, code_nip=None, REQUEST
     """
     result = []
     accessible_depts = []
-    deptList = context.list_depts()  # definis dans Zope
+    deptList = context._list_depts()  # definis dans Zope
     for dept in deptList:
         # log('%s searching %s' % (str(REQUEST.AUTHENTICATED_USER),dept))
         if can_view_dept(dept, REQUEST):
diff --git a/sco_formsemestre.py b/sco_formsemestre.py
index 2a5db9c..27d94e1 100644
--- a/sco_formsemestre.py
+++ b/sco_formsemestre.py
@@ -495,7 +495,7 @@ def sem_est_courant(context, sem):
 
 def scodoc_get_all_unlocked_sems(context):
     """Liste de tous les semestres non verrouillés de tous les départements"""
-    depts = context.list_depts()
+    depts = context._list_depts()
     semdepts = []
     for dept in depts:
         semdepts += [