Proof of Possession to Devices for Onboarding

This memo specifies a RESTful interface for local deployments to demonstrate proof of possession to a device or to a manufacturer authorized signing authority (MASA). This covers the case where a MASA would not otherwise have knowledge of where a device is deployed, or when a MASA may not be required. Such knowledge is important to onboard certain classes of devices, such as those on IEEE 802.11 networks.