KSL protocol: design and implementation

Recently several payment protocols have been proposed and have claimed to operate well in wireless environments. However, most of them are merely theoretical approaches and have not been really implemented. In this paper, we present detailed implementation of KSL protocol, a newly proposed mobile credit-card payment protocol. An environment with a client using a PDA performing transactions over a wireless LAN was set up and used for testing the implementation. We discuss several important issues regarding the implementation including the suitability of deploying various kinds of cryptographic algorithms to the protocol. Ease of use of the implementation has also been accounted for and factored in. The results show that the KSL protocol offers satisfactory transaction performance and secure transaction.