科研之友
微信
新浪微博
Facebook
分享链接
摘要
In 2009, Lee and Chang proposed an electronic t-out-of-n lottery protocol over the Internet based on the Chinese remainder theorem and blind signature. However, a security flaw exists in Lee-Chang's protocol that the lottery agent and the malicious purchaser can collude to control the winning result, which is unfair for the honest participants. On the basis of a verifiable random number generated by using the Lagrange interpolation formula over a finite field, an improved t-out-of-n e-lottery protocol is proposed, which guarantees that each participant can generate the winning result equally. The improved protocol achieves public verifiability and fairness without a trusted third party and a delaying function, which makes it more robust and more efficient.
