diff --git a/doc/single_host/cakey.pem b/doc/single_host/cakey.pem
new file mode 100644
index 0000000..910fcbd
--- /dev/null
+++ b/doc/single_host/cakey.pem
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----