There exists the USB Authentication Specification Rev. 1.0 [1] which states in section 3.3: "A private key used by one Authentication Responder shall not be us

There exists the USB Authentication Specification Rev. 1.0 [1] which states in section 3.3: "A private key used by one Authentication Responder shall not be used by any other Authentication Responders. For example, one instance of a USB PD power supply cannot have the same private key as another instance of the USB PD power supply, even if they are otherwise identical model." [1] https://usb.org/document-library/usb-authentication-specification-rev-10-ecn-and-errata-through-january-7-2019 https://usb.org/document-library/usb-authentication-specific...