Defining Elliptic Curve Cryptography Algorithms for use with DKIM

Document Type Expired Internet-Draft (dcrup WG)
Author Scott Rose 
Last updated 2017-12-23 (latest revision 2017-06-21)
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


DomainKeys Identified Mail (DKIM) uses digital signature to associate a message with a given sending domain. Currently, there is only one cryptography algorithm defined for use with DKIM (RSA). This document defines four new elliptic curve cryptography algorithms for use with DKIM. This will allow for algorithm agility if a weakness is found in RSA, and allows for smaller key length to provide the same digital signature strength.


Scott Rose (

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