diff --git a/exam/ex.tex b/exam/ex.tex
index 36ec555..1cbcd0b 100644
--- a/exam/ex.tex
+++ b/exam/ex.tex
@@ -206,7 +206,12 @@
       IND-CCA2. The authors use the Fujisaki-Okamoto transform to achieve
       IND-CCA2 security.
 
-    \item \TODO
+    \item The scheme can be used to exchange symmetric keys between parties
+      with the usage of the key encapsulation mechanism (KEM). In that scenario,
+      the sender encrypts a symmetric key with LEDAcrypt and shares the
+      encrypted key with the other party. The other party then decrypts the
+      message to obtain the symmetric key which can be used for further
+      communication.
 
     \item \TODO