A new E-cash scheme based on a trapdoor hash function

As online shopping has become more popular because of recent changes in consumption patterns, many electronic cash schemes have proposed. Electronic cash schemes generally utilize public key algorithms to maintain electronic cash security. However, public key algorithms use many computation resources, and make electronic cash schemes inefficient for mobile devices to compute. Furthermore, the denominations of electronic cash are fixed, and the electronic cash spending date is hard to record. It will cause the lack of flexibility while applying. This research proposes a new electronic cash scheme that utilizes trapdoor hash function technology. The proposed scheme not only allows users to apply for desired denominations of electronic cash and to record transaction dates, but also decreases calculation costs, that is, our scheme can be implemented efficiently in all mobile devices.