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Functions Of A Distributed Database

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ABSTRACT: The domain naming server is a very important component which virtually plays a key role in every internet transaction. DNS plays role of a distributed database that helps in convenient storing and retrieving of data records. DNS now works well and it is also sometimes mentioned that any new changes added to the present DNS may contribute to interruption to its functionality and can also contribute towards additional complexity which is undesirable current networks and future networks rely essentially on DNS and it is important that DNS should be much secured. The DNS can be easy attacked and such attack can cause dire consequences so it specifies the importance to use the secured version of DNS to avoid such consequences. To employ such a version involves more cost. Domain Names are converted into the corresponding IP address by using the Domain Naming Server. There are threats to DNS system like packet interception, query predication and cache poisoning. Data integrity and Data origin authentication are the two essential security requirements to have a secure DNS. We present a survey paper in which we observe the possible attacks on DNS and found that Public key cryptography (PK-DNSSEC) and Symmetric key cryptography (SK-DNSSEC) are the two approaches for secured DNS. SK-DNSSEC cryptography is good for recursive name servers and PK-DNSSEC cryptography is better for referral and authoritative name servers. PK-DNSSEC is suitable for static data and when data is

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