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一种基于彩票内容保护的电子彩票方案的改进


□ 唐西林 郭海艮

   (华南理工大学 理学院, 广州 510640)
  
  摘 要:设计了一种对彩票内容进行保护的电子彩票方案,可以使彩票发行商在兑奖前不知道彩民的投注内容。通过采用电子现金协议,电子彩票方案可以在银行离线的情况下运行,并由于电子现金的盲性,更好地保护了彩票购买者的个人隐私。通过采用hash链方法,可以公开验证所有投注彩票,防止发行商伪造彩票、伪造销售额、伪造中奖奖金以及防范其内部人员攻击。该电子彩票方案具有隐私性、不可伪造性、不可重复性、可追踪、不可否认性、公开验证性等安全特点。
  关键词:电子彩票;hash链;电子现金协议
  中图分类号:TP309文献标志码:A
  文章编号:1001-3695(2009)04-1506-03
  
  Improvement of electronic lottery scheme based on protecting content of lotteries
  
  TANG Xi-lin, GUO Hai-gen
  (College of Science, South China University of Technology, Guangzhou 510640, China)
  Abstract:This paper designed an electronic lottery scheme which could protect the content of lotteries.This scheme could ensure that the lottery issuers know nothing about relevant information of lotteries before cash in the bonus. By adopting an electronic cash protocol,this scheme could ran under the off-line bank. Because the anonymity of the electronic cash,it could protect the purchasers’ privacy better. By adopting the hash chain,all the lotteries could be verified publicly,prevented the issuers from forging lotteries,the sales,the bonus as well as attacks from their own staff. There are many security properties in this scheme,such as privacy,un-forgeable,non-repeatable,traceable,non-repudiation,publicly verification and so on. ......
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