A CAO could be secured by providing a password for it. The password should be remembered to view the CAO signal flow.
The password could be attached to the cao during the time of creation or during editing he cao. It is not mandatory to provide the password.
A textbox is provided in the bottom of the view to enter the password during the time of creating a CAO editing it.

The signal flow should be saved after entering the password.
The password entered would be shown as **** instead of plain text. This is to ensure the security of the CAO. The password can be changed as many times as possible.

In order to view this signal flow again, the users have to use the edit cao option. If the CAO is password protected, then a textbox is displayed for authentication. If the password entered is authenticated, then the CAO Signal flow would be seen. In case there is no password for the CAO, then the below authentication window will not be seen.

If the password entered is matching, then the cao view would be displayed. In case the passwords don’t match, then a message box is displayed.

Please note that the password will be exported along with CAO and the users who import the cao have to use the same old password to edit the cao.