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Automatic Forwarding for ECDH Curve25519 OpenPGP messages

Document Type Expired Internet-Draft (individual)
Expired & archived
Author Aron Wussler
Last updated 2024-01-11 (Latest revision 2023-07-10)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


An OpenPGP user may want to request their email provider to automatically forward some or all of the messages they receive to a third party. Given that messages are encrypted, this requires transforming them into ciphertexts decryptable by the intended forwarded parties, while maintaining confidentiality and authentication. This can be achieved using Proxy transformations on the Curve25519 elliptic curve field with minimal changes to the OpenPGP protocol, in particular no change is required on the sender side. In this document we implement the forwarding scheme described in [FORWARDING].


Aron Wussler

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