Abstract: A method for updating software includes verifying an update for first software that drives a security execution environment in a non-security execution environment, updating the first software by use of a first image of the first software update stored in the non-security execution environment, verifying an update for second software that drives a security device controlled by the security execution environment, in the security execution environment, and updating the second software by use of a second image of the second software update stored in the security execution environment.

Abstract: A method for communicating medical data includes forming a secure channel between a first medical device and a second medical device connected to each other through a network on the basis of first authentication information of the first medical device and second authentication information of the second medical device; encrypting medical data that is obtained by the first medical device using a secure circuit that is provided in the first medical device; and transmitting the encrypted medical data to the second medical device through the secure channel.

Abstract: In a method of controlling an electronic device using a wearable device, the electronic device is paired with the wearable device. A cryptographic key, which corresponds to the electronic device, is stored in a secure storage device included in the wearable device. A distance between the wearable device and the electronic device is estimated by the wearable device. An unlock signal including the cryptographic key, which is stored in the secure storage device, is transmitted from the wearable device to the electronic device when the estimated distance is smaller than a threshold distance. The electronic device is unlocked based on the unlock signal.

Abstract: A method is for displaying a schedule in a wearable device is provided. The method includes displaying a watch screen on a display of the wearable device and displaying an event display icon corresponding to a scheduled event on the watch screen.