为了保护电子拍卖过程中投标者的隐私,以及防止投标者中标后反悔,本文利用签名技术和位承诺协议,提出了一个安全高效的M+1匿名拍卖协议,该协议不仅保证了标价的保密性和可验证性,投标者对所投标价的不可否认性和匿名性,而且保证了在整个拍卖过程中,无人可以操纵其他人的投标。即使某一投标者与拍卖代理相互勾结,也不会影响协议的安全性和有效性。
The protection of bidder privacy and the prevention of bidder default are the keys in the designing of auction protocol.This paper designed a new secure and efficient (M+1)-st auction protocol.Using the digital signature technology and bit commitment protocol,it not only guarantees the non-repudiation and anonymity of bidders,but also ensures that nobody can manipulate others in the whole auction.And also,this protocol achieves properties of bid secrecy and verifiability.Even when malicious bidders collude with auctioneers,it is still secure and valid.