A secure identifier is derived, using a secured microcontroller of a computing device, that is unique to a pairing of the computing device and a particular domain. Secure posture data corresponding to attributes of the computing device is identified in secured memory of the computing device. The secure identifier and security posture is sent in a secured container to a management device of the particular domain. The particular domain can utilize the information in the secured container to authenticate the computing device and determine a security task to be performed relating to interactions of the computing device with the particular domain.