Thank you for the post.
FileMaker Inc. does not have official recommendations for hosting providers; however, we do provide a way to search through our website:
Check the box "Show only Hosting Providers" and include any other filters (Country, Keyword, Industry, etc.) you wish to use.
Additionally, security is the responsibility of the developer, as a new file created in FileMaker Pro comes with the default "Admin" account and no password.
Here is the most recent FileMaker 13 Security Guide for more information: