Dnssec Case Study

Dnssec Case Study

DNSSEC is a set of DNS extensions that authenticates the origin of zone data and verifies its integrity by using public key cryptography. That is, the extensions permit DNS clients to ask the questions, "Did this DNS data really come from the zone's owner?" and "Is this really the data sent by that owner?"

DNSSEC provides three distinct services: key distribution by means of KEY resource records stored in the zone files, origin verification for servers and data, and verification of the integrity of zone data. DNSSEC relies upon a cascading chain of trust: The root servers provide validation information for the top–level domains, the top–level domains provide validation information for the second–level domains, and so on.

Public key cryptosystems

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