A new Request for Comments is now available in online RFC libraries. RFC 8473 Title: Token Binding over HTTP Author: A. Popov, M. Nystroem, D. Balfanz, Ed., N. Harper, J. Hodges Status: Standards Track Stream: IETF Date: October 2018 Mailbox: andreipo@microsoft.com, mnystrom@microsoft.com, balfanz@google.com, nharper@google.com, Jeff.Hodges@KingsMountain.com Pages: 25 Characters: 63182 Updates/Obsoletes/SeeAlso: None I-D Tag: draft-ietf-tokbind-https-18.txt URL: https://www.rfc-editor.org/info/rfc8473 DOI: 10.17487/RFC8473 This document describes a collection of mechanisms that allow HTTP servers to cryptographically bind security tokens (such as cookies and OAuth tokens) to TLS connections. We describe both first-party and federated scenarios. In a first- party scenario, an HTTP server is able to cryptographically bind the security tokens that it issues to a client -- and that the client subsequently returns to the server -- to the TLS connection between the client and the server. Such bound security tokens are protected from misuse, since the server can generally detect if they are replayed inappropriately, e.g., over other TLS connections. Federated Token Bindings, on the other hand, allow servers to cryptographically bind security tokens to a TLS connection that the client has with a different server than the one issuing the token. This document is a companion document to "The Token Binding Protocol Version 1.0" (RFC 8471). This document is a product of the Token Binding Working Group of the IETF. This is now a Proposed Standard. STANDARDS TRACK: This document specifies an Internet Standards Track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the Official Internet Protocol Standards (https://www.rfc-editor.org/standards) for the standardization state and status of this protocol. Distribution of this memo is unlimited. This announcement is sent to the IETF-Announce and rfc-dist lists. To subscribe or unsubscribe, see https://www.ietf.org/mailman/listinfo/ietf-announce https://mailman.rfc-editor.org/mailman/listinfo/rfc-dist For searching the RFC series, see https://www.rfc-editor.org/search For downloading RFCs, see https://www.rfc-editor.org/retrieve/bulk Requests for special distribution should be addressed to either the author of the RFC in question, or to rfc-editor@rfc-editor.org. Unless specifically noted otherwise on the RFC itself, all RFCs are for unlimited distribution. The RFC Editor Team Association Management Solutions, LLC