Computing device secure boot

A computing device comprising:

• a processor;
• one or more hardware components;
• one or more communication channels configured to provide a respective connection between the processor and each of the one or more hardware components;
• and
• a secure memory configured to store a baseline value of respective electrical characteristics for each of the respective connections between the processor and each of the one or more hardware components,
• wherein the processor is configured to:
• determine, during a boot process of the computing device, a value of an electrical characteristic of a particular connection between the processor and one of the one or more hardware components, wherein the electrical characteristic includes one or more of impedance, inductance, capacitance, or frequency response;
• determine whether the value of the electrical characteristic of the particular connection is within a threshold amount of the baseline value of the electrical characteristic of the particular connection stored in the secure memory;
• responsive to determining that the value of the electrical characteristic of the particular connection is within the threshold amount of the baseline value, complete the boot process;
• and
• responsive to determining that the value of the electrical characteristic of the particular connection is not within the threshold amount of the baseline value, prevent the computing device from completing the boot process.

A non-transitory computer-readable storage medium encoded with instructions that, when executed, cause a processor of a computing device to:

• determine, during a boot process of the computing device, a value of an electrical characteristic of a connection from the processor to a component of the computing device, wherein the electrical characteristic includes one or more of impedance, inductance, capacitance, or frequency response;
• determine whether the value of the electrical characteristic is within a threshold amount of a baseline value of the electrical characteristic;
• responsive to determining that the value of the electrical characteristic is within the threshold amount of the baseline value, complete the boot process;
• and
• responsive to determining that the value of the electrical characteristic is not within the threshold amount of the baseline value, prevent the computing device from completing the boot process.