A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : DNSSEC Wildcard Optimization
Author(s) : O. Kolkman et al.
Filename : draft-olaf-dnsext-dnssec-wildcard-optimization-02.txt
Pages : 14
Date : 2003-1-8
Secure denial of the existence of wildcards may lead to a large
number of NXT Resource Records and associated SIG Resource Records in
DNS responses, even in the common case when wildcards are not present
in the zone. This optimization uses one bit from the NXT type array
to signal that there is no closer wildcard in the zone for a given
query name. This reduces the packet size and the need for executing
slow, and complicated, code paths in the case when queries are made
to zones which have the bit set at zone signing time. In cases where
there are no wildcard RRs in the zone (e.g. the root zone) only one
NXT RR and corresponding SIG is needed for denial of existence of
both a full match and any possible wildcard matches.
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