公开(公告)号：US20170364683A1

公开(公告)日：2017-12-21

申请号：US15185891

申请日：2016-06-17

Applicant: Google Inc.

Inventor： Shawn Willden ,  Jorge Coronel

IPC: G06F21/57 ,  G06F12/14 ,  G06F9/44 ,  G06F21/53

CPC classification number: G06F21/575 ,  G06F9/4403 ,  G06F12/14 ,  G06F21/53 ,  G06F2212/1052 ,  G06F2221/2149

Abstract: A device includes a processor, a hardware component, a communication channel between the processor and the hardware component, and a secure memory that stores a baseline value of an electrical characteristic of the connection. The processor is configured to determine, during a boot process of the computing device, a value of the electrical characteristic, the electrical characteristic being one or more of impedance, inductance, capacitance, or frequency response, determine whether the value is within a threshold amount of the baseline value, and, responsive to determining that the value of the electrical characteristic is within the threshold amount, complete the boot process, and, responsive to determining that the value of the electrical characteristic is not within the threshold amount, prevent the computing device from completing the boot process.