The Address Resolution Protocol (ARP) due to its statelessness and lack of an authentication mechanism for verifying the identity of the sender has a long history of being prone to spoofing attacks. ARP spoofing is sometimes the starting point for more sophisticated LAN attacks like denial of service, man in the middle and session hijacking. In a current voting based method an active technique is used for finding out the legitimate one by collection of voting's from the neighboring host. The drawback of this system is most of the host in a LAN must follow the MR-ARP protocol. In this paper a centralized server will collects all the ip-mac pairs of every host in the LAN and maintains a table of legitimate host. Destination host checks the ip-mac conflict in the LAN and informs about the hacker to the centralized server which takes care of the trusted communication between the participating hosts. Hence, the proposed work detection and prevention of ARP spoofing lead to appreciable result.

Big data provides users with a good deal of flexibility and convenience. However, massive information conjointly brings terribly serious security issues, particularly for enterprise information security kept within the big data. Once the information is outsourced to a third party, the information privacy has become a significant drawback, like user authentication, the integrity of data. With the addition of security measures to Big Data, strong encounter against cybercrime can be achieved [1]. A mutual authentication scheme based on the virtual smart card using hashing function for large information is proposed to resolve the matter of unlawful user's access to the big data servers and also the illegal user's access to the legal cloud servers. This paper conjointly maintains user sensitive information within the big data by using file swapping technique. Once the user accessed the information, the user information will be swapped to completely different servers so that the file can be secured and nobody can hack or theft our information.