Abstract: The present invention relates to user interface distribution method for multi-device interaction, and more particularly, to use the screens of a plurality of smart devices as user interfaces in flexible and fast manner without modifying the code of the application running in these devices. According to the present invention, by separating a subtree including target UI objects of a host device and moving it to a guest device, the target UI objects can be rendered on the guest device without modifying the application. In addition, since the interaction between the UI objects of the guest device and a host application logic is made in the form of a local function call, it is possible to transparently convert the local function call within the device into an RPC call between devices, also provides a way to maintain interaction between devices without modifying the application.

Abstract: Provided is a method for distributing a user interface (UI) for heterogeneous multi-device interaction, and more particularly, a method of distributing a UI between heterogeneous platforms, the method supporting distribution of UI units so that a flexible multi-device use environment, such as a live streaming application, is possible even between heterogeneous platforms. A provided mobile operating system security technology allows a flexible multi-device use environment, such as a live streaming application, between heterogeneous platforms by supporting the distribution of UI units and ensures secure multi-surface sharing by considering and preventing security risk elements in a multi-device environment.