A Secure Off-line Electronic PaymentSystem Based on Bilinear Pairings and Signcryption
Debasis Giri1, Arpita Mazumdar2

1Debasis Giri, Department of Computer Science and Engineering, Haldia Institute of Technology, Haldia-721657, India.
2Arpita Mazumdar, Department of Master of Computer Applications, St. Mary’s Technical Campus Kolkata, Kolkata-700 126, India.
Manuscript received on January 01, 2013. | Revised Manuscript received on January 02, 2013. | Manuscript published on January 05, 2013. | PP: 376-380 | Volume-2, Issue-6, January 2013.
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: In this paper, we have designed an off-line e-cash payment system based on bilinear pairings for low-value transaction. We use the concept of proxy signcryption for communication among the entities. In our system, the token is issued & authenticated by Bank. Customer delegates the signing capability to Merchant. Bank verifies the original signer (customer) and proxy signer (Merchant) and ensures the originality of the transaction. Unlike the existing e-payment system question of double spending of e-cash arises because each transaction is made uniquely identifiable. Hence, no separate protocol is needed to check double spending. The proposed scheme provides anonymity, authenticity, confidentiality and fairness.
Keywords: Off-line; Proxy Signature; Security; Electronic Payment; Bilinear pairings.