docs: Extending documentation and manpages
Refs: #1462
Change-Id: If33a0f3c623daf3502ed301bcdc63892779463e3
diff --git a/docs/manpages/ndnsec-import.rst b/docs/manpages/ndnsec-import.rst
new file mode 100644
index 0000000..5b61f59
--- /dev/null
+++ b/docs/manpages/ndnsec-import.rst
@@ -0,0 +1,33 @@
+ndnsec-import
+=============
+
+``ndnsec-import`` is a tool to import an identity's security data that is prepared by
+``ndnsec-export``.
+
+Usage
+-----
+
+::
+
+ $ ndnsec-import [-h] [-p] input
+
+Description
+-----------
+
+``ndnsec-import`` read data from ``input``. It will ask for password if the input contains private
+key. If ``input`` is ``-``, security data will be read from standard input.
+
+Options
+-------
+
+``-p``
+ Indicates the imported data containing private key. A password will be asked for data encryption.
+
+Examples
+--------
+
+Import an identity's security data including private key:
+
+::
+
+ $ ndnsec-import -p input_file