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.