Secured Data Transmission using Multiple Data Servers for Examination System

The use of Wireless Sensor Network (WSN) in institute applications is growing rapidly because it has got several advantages over the traditional wired systems such as ease of use, reduced risk of infections, reduced risk of failures, reduced user discomfort and it provides enhanced mobility, but providing security and privacy is a major concern. There are several solutions in order to protect the institute data during transmission, but it cannot stop the inside attacker from revealing the institute sensitive data. The inside attacker can be a user database administrator. The main aim of this paper is to prevent the inside attack by distributing the institute data securely in multiple servers and to employ the AES cryptosystem to carry out statistic analysis on the institute data without compromising the privacy of the institute's data. Algorithm which is use in the technology is Advance Encryption Standard (AES).The more popular and widely adopted symmetric encryption algorithm likely to be encountered now a days is the Advanced Encryption Standard (AES). AES is found at least six times faster than triple DES.