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Stéphane Bortzmeyer
Regarding Geoff Huston's comment, and after discussion with Florian Maury, and with his authorization, I translate here his analysis : "The attack [NXNSattack] is quite different, and it has a significant impact. It was not detected at the time of iDNS. Moreover, the article  [about NXNSattack] is well written, mentions the related work and explains the differences. To summarize, this is an new and serious contribution."