dnsext/ecdsaについて、ここに記述してください。
http://www.ietf.org/id/draft-ietf-dnsext-ecdsa-01.txt
Elliptic Curve DSA for DNSSEC
draft-ietf-dnsext-ecdsa-01
Abstract
This document describes how to specify Elliptic Curve DSA keys and
signatures in DNSSEC. It lists curves of different sizes, and uses
the SHA-2 family of hashes for signatures.