It is expected that work on end-to-end Diameter security might make it easier to establish trust in non-adjacent nodes for DRMP purposes. Readers should be reminded, however, that the DRMP mechanism allows Diameter agents to modify AVPs in existing messages that are originated by other nodes. If end-to-end security is enabled, there is a risk that such modification could violate integrity protection. The details of using any future Diameter end-to-end security mechanism with DRMP will require careful consideration, and are beyond the scope of this document.