The Design and Implementation of a Secure and Efficient E-Lottery System

• Main Author: 游菀瑄
• Other Authors: 詹進科
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/00103491254492639212

碩士 === 國立中興大學 === 資訊科學研究所 === 92 === With the rising development of Internet, it symbolizes the coming of e-time. In order to reach high-speed and convenience, much commercial behavior has developed a new critical point of e-commerce. People not only browse the information, but also enjoy all kind of network service. For example, e-auction, e- ticketing, e-shopping, e-stock, etc. It often takes more time and efforts to go shopping physically than virtually. We hope that we can buy everything safely by touching buttons only when we surf on the Internet. But is it really reliable? If we would like to buy the lottery on the internet today, what kinds of demands customers need and how to set up their trust. It is our research topic. Based on basic cryptographic mechanisms (one-way hash function, bit commitment, generating key pairs, signing and verifying of RSA cryptosystem and so on), we propose a network version of the public lottery of the Republic of China. The scheme facilitates users buying lotteries conveniently and securely. The proposed scheme satisfies the secure requirements of anonymity, privacy, fairness, publicly verifiability, non-repudiation. It also eliminates unreasonable hypotheses and non-practical assumptions of the previous works. In addition, the application, the application of hash function makes computation easier and more efficient. We have implemented our scheme using SSL, certificate services, Java, VC++, VB and ActiveX controls. The implementation safely generates each user’s private locally on his own computer, and securely conveys the data to the server through SSL channel. Most important of all, the winning numbers of a lottery is fair and random; no one can cheat on this way. In addition to satisfying all demands, friendly GUI design makes customers more convenient.