RISE AB RISE AB RISE AB Ericsson AB This document specifies a profile for the Authentication and Authorization for Constrained Environments (ACE) framework. The profile uses Object Security for Constrained RESTful Environments (OSCORE) and/or Group OSCORE to provide communication security between a Client and (a group of) Resource Server(s). Furthermore, the profile uses (Group) OSCORE to provide server authentication, and OSCORE to achieve proof-of-possession for a key owned by the Client and bound to an OAuth 2.0 Access Token. Also, the profile provides proof-of-group-membership for the Client, by securely binding the pre-established Group OSCORE Security Context to the pairwise OSCORE Security Context newly established with the Resource Server.