diff --git a/tools/doimage/secure/aes_key.txt b/tools/doimage/secure/aes_key.txt
new file mode 100644
index 0000000..3e8a888
--- /dev/null
+++ b/tools/doimage/secure/aes_key.txt
@@ -0,0 +1 @@
+ABCDEF1234567890ABCDEF1234567890ABCDEF1234567890ABCDEF1234567890