

With the help of DNSSEC, the answers of the name server can be digitally signed and thus the authenticity of the sent DNS answers can be ensured. DNSSEC is also the basis for the use of other security mechanisms. For example, "Domain Name based Authentication of Named Entities", DANE for short, can be used in conjunction with DNSSEC to encrypt mail communication between mail servers, or the authenticity of SSH host keys can be guaranteed via DNSSEC with the help of SSHFP (Secure Shell Fingerprint).
DNSSEC delegations are generally published by the responsible toplevel registry not in real time but with a time delay. These entries are also subject to caching by Resolver. Additional waiting times may therefore occur when activating and deactivating DNSSEC.
Leibniz Supercomputing Center
of the Bavarian Academy of Sciences
Boltzmannstraße 1
85748 Garching - Germany