An incentive attached peer to peer (P2P) electronic coupon system is proposed. This system intends users to distribute the e-coupon in the mobile envirbnment by paying incentives to the mediators. The distribution history that indicates the mediators is recorded to the e-coupon, so users possess the important customer data in their mobile devices. In order to prevent evil users from interpolating the e-coupon and the distribution history, the security mechanism combined public-key crypto system, message digest, and digital-watennarking technologies are proposed. Through the experiment of the prototype system using PDA, it is confirmed that the developed system works efficiently.
Peer to peer, incentive, grapevine network, electronic coupon, distribution history information
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