SharePoint Column Permission assigns users / groups read / edit permission to list columns. SharePoint default permission setting does not define column permissions.

SharePoint Permission Boost controls column permissions by overwriting some control templates. It provides following functions: If SharePoint user has no read permission to some column, The contents of this column will be hidden to him / her in item display form or edit form

List views which contain this column are invisible to him / her and cannot be selected by him / her in View Select Menu If SharePoint user has no edit permission to some column The contents of this column will be read-only to him / her in item edit form

List views which contain this column cannot be switched to datasheet view or be edited in MS Access (the menu items in Actions Menu will be hidden to him /her)