RFC 4033:DNS Security Introduction and Requirement...
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authentication and integrity


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... The DNS security extensions provide origin authentication and integrity protection for DNS data, as well as a means of public key ...


... DNS) security extensions provide origin authentication and integrity assurance services for DNS data, ...
... security mechanism described in Section 3.1 only provides a way to sign existing RRsets in a zone. The problem of providing negative responses with the same level of authentication and integrity requires the use of another new resource record type, the NSEC record ...



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