Electronic device e.g. portable telephone, for e.g. mail distribution field, has processor switching device`s execution in secured execution mode in which processor requests necessary for applicative program execution are considered

摘要

#CMT# #/CMT# The device has a processor (30) adapted for switching execution of the device in a secured execution mode. Requests of the processor necessary for the execution of a secured applicative program (APs) are taken into account, in the secured execution mode. A joystick permits to displace a pointer. A memory manager (32) is provided for storing digital images in a memory zone (33) which is accessible only in the secured execution mode. The screen displays a digital image representing a formula with three cases constituting entering zones. #CMT# : #/CMT# Independent claims are also included for the following: (1) a method for capturing a digital image and being implemented by a processor having a secured execution mode (2) a computer program comprising instructions for implementing a method for capturing a digital image (3) a data medium on which a computer program comprising instructions for the execution of a method for capturing a digital image is stored. #CMT#USE : #/CMT# Electronic device e.g. portable telephone and personal digital assistant (PDA), in document dematerialization and mail distribution fields. #CMT#ADVANTAGE : #/CMT# The requests of the processor necessary for the execution of the secured applicative program are taken into account in the secured execution mode, thus permitting to guarantee that all the operations and resources utilized for the display and inputting are under the unique control of the secured applicative program. The secured applicative program guarantees that the digital image is the same image in which a user has signed on the screen of the device, while avoiding the copying and modification of the image by a virus. The device avoids the utilization of a personal cryptographic key in a simple manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows an architecture of an electronic device. APs : Secured applicative program 10 : Screen 30 : Processor 32 : Memory manager 33 : Memory zone 34 : Memory.