摘要： 在目前的密封式电子拍卖中，都没有解决标价瓶颈问题，即有多个投标者同时提交了相同的获胜价位，有些方案仅仅把标价提高，所有的投标者再重新进行拍卖，这样既增加了计算量又增加了通信量，使拍卖效率很低。该文利用多项式的秘密共享和Bit 承诺技术，给出了一个新的安全有效的电子拍卖方案。

关键词: 多轮电子拍卖；Bit 承诺；秘密共享

Abstract: There is a price bottle-neck problem in all the seal-bid at present, namely two or more bidders choose the same highest price in a round,some schemes only raise the price again, and all the bidders continue action. Because of the price bottle-neck, efficiency of the auctions is affected by the price bottle-neck very much. This paper presents a new secure efficient electronic auction using Bit commitment and secret sharing scheme

Key words: Multi-round electronic auction; Bit commitment; Secret sharing