Intelligent Security Assurance System in Electronic Payment System using Public Key Cryptosystem

The use of internet in the recent years gave a platform for conducting business by deploying business-to-business (B2B) and business-to-consumer (B2C) applications. However this payment related transactions in this regard have experienced skepticism among the users. Earlier literature confirms the use of Secure Sockets Layer (SSL) as the trusted protocol which is now proved to exhibit slower response time on the server side which is undesirable when low memory devices like personal digital assistant, mobile phones are being used. Based on past facts Elliptic Curve Cryptography (ECC) proves to be faster in terms of response to transaction requests and also occupies less memory when compared to few well known algorithms like RivestShamir Adelman (RSA). On practical verification using our proposed system for an e-payment system showed considerable improvement in the performance with the implementation of ECC over prime fields, GF(p). The proposed system is designed such that a server will use RSA for symmetric key exchange among its clients until it reaches a threshold of transaction requests from the end-users, and for the upcoming transactions it automates to use Elliptic Curve Diffie Hellman (ECDH)for the key exchange to reduce the response to transaction time taken by the server.