一种简单高效的密封式电子拍卖方案  

A Simple and Efficient Sealed-bid Electronic Auction Scheme

作　　者：程文娟[1] 董莹莹[1] 韩俊光 

机构地区：[1]光合肥工业大学计算机与信息学院,合肥230009

出　　处：《计算机工程》2014年第3期171-174,共4页Computer Engineering

基　　金：国家自然科学基金资助项目(51274078);教育部人文社会科学科研基金资助项目“基于SMC的电子商务安全性研究”(09YJA630029)

摘　　要：针对目前大多数的电子拍卖方案都是假设存在一个可信第三方,使得电子拍卖的安全性有所降低的问题,提出一个基于不可信第三方的密封式电子拍卖方案。采用数字签名技术对竞拍者的身份进行验证,确保竞拍者身份的隐私性。在计算成交价时,基于离散对数求解的困难性,对竞拍价的二进制长度进行加密封装,保证竞拍价的秘密性以及结果的正确性。分析结果证明,该方案设计简单,安全性较高,在计算效率上相对于现有多数电子拍卖方案有较大的提高。Most of the electronic auction schemes are assumed the existence of a trusted third party, which makes the security of the electronic auction decreased. Aiming at the problem, this paper proposes a sealed-bid electronic auction scheme based on an untrusted third party. It uses the digital signature technique to verify the identity of the bidder and ensure the privacy of the bidder＇s identification. In calculating the transaction price, based on the intractability of the discrete logarithm, it encrypts and packages the binary length of the auction price to ensure the secrecy and accuracy of the results of auction price. Analysis results show that the scheme is simple and has high security, and the computational efficiency relative to most of the existing electronic auction scheme has greatly improved.

关 键 词：电子商务 密封拍卖 匿名性 竞拍价保密 数字签名 离散对数问题 

分 类 号：TP309.07[自动化与计算机技术—计算机系统结构]