Covert =  A covert application refers to a situation where you don’t want the person to know that they are being watched or recorded.  Also known as ‘hidden’ cameras or “nanny cams.” Covert cameras are typically legal in a residential setting.  Individual states have various laws concerning the videotaping of employees or business patrons.  In many states, it is necessary to post signage notifying employees and/or business patrons that they are under video surveillance.