Marco Tiloca, Rikard Hoeglund, 2022-07-11, Object Security for Constrained RESTful Environments (OSCORE) can be employed to protect CoAP messages close-to-close amongst two endpoints at the application layer, also in the presence of intermediaries such as proxies. Also, it defines how to protected a CoAP information by making use of various, nested OSCORE protections, e.g.