diff --git a/TODO.txt b/TODO.txt
index 85af584222cb1570846906a90db8b8e214af6983..7c6e6f4fb02a4b5ff40b4996e1c9259e5782f6a0 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -75,3 +75,6 @@ General tasks
 --------------------------------------
 
 - Add, extend or modify comments in PEAR syntax so that they can be read with phpdocumentor.
+
+- Add a function to prevent brute force password attacks to the login script. E.g. by
+  logging all login attempts and allowing only 5 logins every 15 minutes.