The IESG has approved the following document: - 'Using Early Data in HTTP' (draft-ietf-httpbis-replay-04.txt) as Proposed Standard This document is the product of the Hypertext Transfer Protocol Working Group. The IESG contact persons are Adam Roach, Alexey Melnikov and Ben Campbell. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-httpbis-replay/ Technical Summary This document defines requirements for the sending and handling of early data at the HTTP layer. Early data is data associated with the 0-RTT phases of TLS 1.3 and QUIC and is subject to being replayed. The document creates mechanisms for Clients, Servers, and Intermediaries to communicate the status of early data and minimize the risk of replay. It is applicable to all versions of HTTP. Working Group Summary Development of this document mostly focused on the relationship of intermediaries with early data on both the client and server side of their connection. Issues with partly recevied early data also underwent considerable revision but without significant controversy. Document Quality Participation in the document's review and development was very broad. The three authors come from a client, a CDN, and an intermediary background. There was a high level of discussion throughout the process and the Working Group Last Call received review comments from 12 different individuals indicating thorough review. There was strong consensus in the working group for this document with many also expressing an eagerness to have it deployed in the same time frame as TLS 1.3 deployment. There are known implementations in a browser, server, and intermediary and statements of intent to implement from several other parties. Personnel Patrick McManus is the document shepherd; Alexey Melnikov is the responsible Area Director.