OpenPGP specification and ECC

Question

From OpenPGP specification (RFC 4880) section 13.8 (Reserved Algorithm Numbers):

The reserved public-key algorithms, Elliptic Curve (18), ECDSA (19),
and X9.42 (21), do not have the necessary parameters, parameter
order, or semantics defined.

But GnuPG has ECC support. What they use as a reference? How other developers could support ECC and read messages from GnuPG with ECC?

score 3 · Accepted Answer · edited Oct 07 '21 at 08:14

3

While OpenPGP in the current revision is defined by RFC 4880, there are two additional RFCs providing extensions:

RFC 5581 defines the Camellia Cipher in OpenPGP
RFC 6637 defines elliptic curve cryptography in OpenPGP

Furthermore, a draft for EdDSA signatures is already proposed. GnuPG 2.1 already implements this draft.

edited Oct 07 '21 at 08:14

Community

1

answered Jul 24 '15 at 23:38

Jens Erat

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There is also an Internet Draft for EdDSA / ed25519 support in OpenPGP: http://datatracker.ietf.org/doc/draft-koch-eddsa-for-openpgp/ – frasertweedale Jul 25 '15 at 04:52
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Thank you for pointing this out, I extended the answer accordingly. – Jens Erat Jul 25 '15 at 12:33

OpenPGP specification and ECC

1 Answers1