diff --git a/config b/config
index 32a72ac..cc72b87 100644
--- a/config
+++ b/config
@@ -80,7 +80,7 @@ courier_socket =
 
 [rights]
 # Rights management method
-# Value: None | owner_only
+# Value: None | owner_only | owner_write
 type = None
 
 
diff --git a/radicale/rights/owner_write.py b/radicale/rights/owner_write.py
new file mode 100644
index 0000000..ff65648
--- /dev/null
+++ b/radicale/rights/owner_write.py
@@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of Radicale Server - Calendar Server
+# Copyright © 2012 Guillaume Ayoub
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Radicale.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Owner-only write based rights.
+
+Authenticated users have read access to all calendars, but only owners have
+write access to their own collections.
+
+"""
+
+
+def read_authorized(user, collection):
+    """Check if the user is allowed to read the collection."""
+    return True
+
+
+def write_authorized(user, collection):
+    """Check if the user is allowed to write the collection."""
+    return user and user == collection.owner