US Patent 11269999 Protecting computing devices from malicious tampering

In one example, a method performed by a processing system of a server includes sending an instruction to a controller installed on an integrated circuit chip of a remote computing device, wherein the instruction requests that the controller issue a challenge to the integrated circuit, receiving a first signature of the integrated circuit chip from the controller, wherein the first signature is derived by the controller from a response of the integrated circuit chip to the challenge, comparing the first signature to a second signature that is stored on the server, wherein the second signature was derived through testing of the integrated circuit chip prior to the integrated circuit chip being deployed in the remote computing device, and generating an alert when the first signature fails to match the second signature, wherein the alert indicates that the integrated circuit chip may have been tampered with.