公开(公告)号：US11770246B2

公开(公告)日：2023-09-26

申请号：US17010011

申请日：2020-09-02

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Hean Kuang Ong ,  Mark Shahaf ,  Mark Wealleans

IPC: H04L9/08 ,  G06F9/54 ,  G06F21/60 ,  G06F21/57

CPC classification number: H04L9/0861 ,  G06F9/54 ,  G06F21/575 ,  G06F21/602 ,  H04L9/0894 ,  G06F2221/034

Abstract: A multi-processor device includes a first processor implemented with a secured key derivation and storage component and a second processor implemented without a secured key derivation and storage component. In operation, the second processor is configured to execute an initial boot process by loading a limited functionality boot image when the multi-processor device is powered on. During the execution of the initial boot process, the second processor provisions a secure storage container to hold a key material and sends a request to the first processor for a key material. In response, the second processor receives a key material derived at the first processor. The second processor then stores the key material in a volatile memory portion of the secure storage container. The second processor executes a main boot process only after erasing instances of the key material temporarily stored outside of the secure storage container.