A flexible mobile ticket for intelligent public transportation

In the last ten years, wireless technologies and mobile devices are becoming more and more popular around the world; as a result, many mobile services have been created. Among these mobile services, mobile ticket is an emerging technology which can be used for intelligent public transportation. Although many mobile ticket schemes have been proposed, the expiration date and effective time are ignored. In this paper, we propose a flexible and practical mobile ticket scheme where the transport service provider embeds the expiration date in each mobile ticket during the withdrawal phase. The proposed scheme permits that each mobile ticket can be used more than one time if the mobile ticket is valid.