Abstract: A system and method for changing authority for a secure booting operation and an electronic device thereof are provided. The system includes a memory including a plurality of key bit areas in each of which a root key can be received, and a processor core configured to input a new root key to one of the plurality of key bit areas of the memory in response to an external input.

Abstract: An electronic device and a method for managing an application is provided. The electronic device includes a communication module configured to communicate with an external device, a processor includes a normal module and a secure module, and a memory connected to the processor. The normal module of the processor is configured to receive an application package from the external device, and if a secure application is included in at least a portion of the application package, the processor is configured to control for installing the secure application in the memory associated with the secure module.

Abstract: A system and method for changing authority for a secure booting operation and an electronic device thereof are provided. The system includes a memory including a plurality of key bit areas in each of which a root key can be received, and a processor core configured to input a new root key to one of the plurality of key bit areas of the memory in response to an external input.

Abstract: A method of using an electronic device is provided. The method includes comparing, when a request for an access to a resource of the electronic device is identified, a reliability level of a user and a security level of the resource and permitting the access to the resource when the reliability level is equal to or higher than the security level of the resource.