• Minhaj Alam Fatmi
• Mrs. Kavita Dagar

The current Internet version has a number of security problems. The Internet lacks effective privacy and effective authentication mechanisms beneath the application layer. The internet protocol version 6 (IPv6) which is also called internet protocol next generation (IPNG), remedies these shortcomings by having two integrated options that provide security services and improve the level of reliability. The first option is called the Authentication Header (AH) which provides authentication and data integrity and the second options is called the Encapsulating Security Payload (ESP) which provides data integrity and confidentiality to IPv6 datagrams. These both are defined as extension header in IPv6.The internet protocol (IPv6) was developed to extend and eventually replace IPv4’scapabilities but it poses several significant security issues. The emphasis in this paper is to identify the vulnerabilities that come in IPv6 and how to remove those vulnerabilities. The default method for IPv6 address generation uses an Organizationally Unique Identifier (OUI) assigned by the IEEE Standards Association and an Extension Identifier assigned by the hardware manufacturer. For this reason, a node will always have the same Interface ID (IID) whenever it connects to a new network. Because the node's IP address does not change, the node will be vulnerable to privacy related attacks. To remove these issue along with other vulnerabilities (Reconnaissance attack, Extension Header, Denial Of Service (DoS) Attack, Malicious router, Failure of DAD and NUD processes) by the use of mechanism that randomizing the IID during its generation and more importantly, the verification process, but it is the lack of necessary security mechanism and it provides the node with only partial protection against privacy related attacks. In this proposed method to improve the security, I am using cryptographic algorithm called Diffie Hellman (for authentication) and AES algorithm (for encryption and decryption).

IPv6, Security issues of IPv6, IPsec, Randomized Interface ID, Extension Header, Security improvement of IPv6, Deffie Hellman, EUI-64, AES, Datagram

"IPV6 Security Overview and Improvement using Deffie Hellman", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 8, page no.83-90, August-2020, Available :http://www.jetir.org/papers/JETIR2008012.pdf

"IPV6 Security Overview and Improvement using Deffie Hellman", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 8, page no. pp83-90, August-2020, Available at : http://www.jetir.org/papers/JETIR2008012.pdf