Compact DNSSEC Denial of Existence or Black Lies

Document Type Expired Internet-Draft (individual)
Authors Filippo Valsorda  , Ólafur Guðmundsson 
Last updated 2016-09-22 (latest revision 2016-03-21)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes a technique to generate valid DNSSEC answers on demand for non-existing names by claiming the name exists and returning a NSEC record for it. These answers require only one NSEC record and allow live-signing servers to minimize signing operations, packet size, disclosure of zone contents and required knowledge of the zone layout.


Filippo Valsorda (
Ólafur Guðmundsson (

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