CONTROLLER AND MEMORY FOR STORING AND PROCESSING SECURITY SOFTWARE AND DATA

摘要

A memory and controller device for storing and processing security software and data is disclosed which includes a controller (100) and loading means (110) for enabling software to be loaded into a storage location (120), (130). The controller provides a signal to the loader (100) when software has been loaded so as to cause the loader to place the controller into a mode where reloading or manipulation of the software in a bootloader state is prevented. The loader may include a fuse which is blown after loading of the software so as to cause a high signal to be provided to the controller in order to prevent the controller (100) from entering the bootloader state or a second controller (200) can be utilised to provide the signal to prevent the controller (100) from entering the bootloader state.