Is there a easy way to move the content over with security.
If you are using SharePoint On Prem please try this one:http://www.codeproject.com/Articles/356985/Moving-a-Sharepoint-Sub-Site-to-its-own-Site-Colle
SharePoint online- The only solution I can advise to you - save site as template, then from solution gallery save to you disk as file, import this solution to another site collection's solution gallery, and recreate site form this new template
For moving/copying contents within a site collection, the easiest and best solution would be to use the manage content and structure option present under the site settings. The link is accessible by following this path.
"Site Settings" -> "Site Administration" -> "Content and Structure"
or you can follow this url directly in your browser "http://sp.abc.com/sites/it/_layouts/15/sitemanager.aspx"
Here are some other links that can help you.