SECURE MODE INDICATOR FOR SMART PHONE OR PDA EXECUTING SECURITY APPLICATIONS

摘要

PURPOSE: A secure mode indicator for a smart phone or a PDA(Personal Digital Assistant) executing security applications is provided to inform a user that a smart device is in a secure mode by installing the secure mode indicator to the smart device executing the security applications. CONSTITUTION: The indicator(155) such as an LED(Light Emitting Diode) is connected to the GPIO(General Purpose Input/Output) latch(154) and is lighten by responding to the GPIO. The GPIO latch is recorded by one logical value and is accessed by a core(103) through a peripheral device bus(156). Operations of the GPIO are controlled by a security signal(152) under control of an SSM(Security State Machine)(150). The GPIO latch is recorded when the security signal is in a security state that a processor(102) indicates the operation of a security software routine.