Open Source Document Management System | OpenKM

This feature is currently only implemented in the professional edition. Now you can apply copy, but will not clone the security as you expected. Should make some modifications in the source code for it. If you want to work on it I can guide about what methods should be modified.

Should start from ExtendedAttributes.java class adding a new boolean variable named security.
follow with DbFolderModule.java with the method extendedCopy(String token, String fldId, String dstId, ExtendedAttributes extAttr)
from here the BaseFolderModule.copy where should be cloned the security values ( here must also do not forget modify BaseDocumentModule.copy and BaseMailModule.copy methods)