@techreport{trammell-spud-req-04, number = {draft-trammell-spud-req-04}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-trammell-spud-req/04/}, author = {Brian Trammell and Mirja Kühlewind}, title = {{Requirements for the design of a Substrate Protocol for User Datagrams (SPUD)}}, pagetotal = 18, year = 2016, month = may, day = 10, abstract = {We have identified the potential need for a UDP-based encapsulation protocol to allow explicit cooperation with middleboxes while using new, encrypted transport protocols. This document proposes an initial set of requirements for such a protocol, and discusses tradeoffs to be made in further refining these requirements.}, }