Using Multiple Signing Algorithms with the ARC (Authenticated Received Chain) Protocol

Document Type Expired Internet-Draft (dmarc WG)
Authors Kurt Andersen  , Seth Blank  , John Levine 
Last updated 2019-09-08 (latest revision 2019-03-07)
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream WG state Parked WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Authenticated Received Chain (ARC) protocol creates a mechanism whereby a series of handlers of an email message can conduct authentication of the email message as it passes among them on the way to its destination. Initial development of ARC has been done with a single allowed signing algorithm, but parallel work in the DCRUP working group ( is expanding the supported algorithms. This specification defines how to extend ARC for multiple signing algorithms.


Kurt Andersen (
Seth Blank (
John Levine (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)