DNS Security Using Cryptography

Abstract

The Domain Name System (DNS) is an essential part of the internet on where function many other protocols rely. DNS is a protocol that resolves host-names to IP addresses over the internal DNS, being an open source, it is less source and it has no means of determining whether domain name or data comes from an authorized domain owner. This security weakness leaves the system vulnerable to a number of attacks such as DNS cache poisoning, DNS spoofing. Hence, there is a need of securing DNS. The digital signatures generated with public key algorithms have the advantage that anyone having the public key able to verify the Digital Signature. The public key is used for encryption and private key is use for decryption. Cryptographic algorithms (i.e. ECDSA) is used for security DNS. Now a days technology growing day by day so there is a need of same level of security along with smaller key sizes. Everyone accesses internet through mobile phones whether it is used to check E-mails or visiting other secure sites, ECDSA involving ECC (Elliptic Curve Cryptography) concepts having less key sizes as compared to RSA be implemented to provide security to DNS.