Dual signature is a significant modernization of SET protocol. The function of the dual signature is to guarantee the authenticity and integrity of data. It links two messages wished-for for two different recipients In this case; the customer wants to send the order information (OI) to the trader and the payment information (PI) to the bank. The one recipient should not need to know another recipient's information. The link is needed so that the customer can confirm that the payment is intended

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... for this order. Elliptic Curve Digital Signature Algorithm (ECDSA) which is one of the variants of Elliptic Curve Cryptography (ECC) have newly come into wide consideration, particularly by the standard developers, as an alternatives to established standard cryptosystems such as the integer factorization cryptosystems and the cryptosystems based on the discrete logarithm problem. The main reason for the attractiveness of ECDSA is the fact that there is no sub exponential algorithm known to solve the elliptic curve discrete logarithm problem on a properly chosen elliptic curve. The present work is first designing a dual signature scheme with ECDSA then comparing their experimental running-times with RSA in an attempt to measure the experimental time efficiencies of each. Simulation results show that proposed design of dual signature scheme reduces the design complexity and computation time of dual signature generation at the same time when ECDSA is applied for dual signature in place of RSA in SET protocol it scales enhanced than RSA.