diff --git a/hwb1/src/hwb1/SecretApplet.java b/hwb1/src/hwb1/SecretApplet.java
index 12520af..a919bdd 100644
--- a/hwb1/src/hwb1/SecretApplet.java
+++ b/hwb1/src/hwb1/SecretApplet.java
@@ -157,6 +157,9 @@ public class SecretApplet extends Applet {
                 } catch (CryptoException exception) {
                     ISOException.throwIt((short)(ISO7816.SW_WRONG_LENGTH | exception.getReason()));
                 }
+                finally {
+                    Util.arrayFill(storage, (short)0, (short)storage.length, (byte)0);
+                }
                 
                 ISOException.throwIt(ISO7816.SW_NO_ERROR);
             }