Low power embedded device using a write-once register to speed up the secure boot from sleep states of the device

Abstract

The application discloses a low power embedded device, which uses a write-once register to speed up the secure boot from sleep states of said device. The object of the application to find a secure storage of the reference hash in low power embedded devices, which can be stored over sleep cycles of the device, and updates of the firmware of such devices are possible, and an unauthorized access to the storage must be prohibited will be solved by a low power embedded device comprising a special-purpose computing system, means for storing firmware of the device and a bootloader for verifying the integrity and authenticity of the firmware, whereas the bootloader checks a firmware hash of the firmware against a reference hash, wherein the reference hash is stored in a write-once register, which is part of an always on power domain of the embedded device.

Dependencies are inferred from the claim text.