The Research Of Secure Bidding Protocol On Net

In the paper, we introduce the appearance and development of inviting public bidding and bidding on net at first. According to standard process of the bid, we'll analyse its special secure request. With the combination between secure request and cryptography technology, an implement protocol of bid on net will be given.The protocol describes the whole bidding process from inviting bidding to grading bidding by using DES, ElGamal, SHA-1 and etc. cryptography arithmetic and technology. Then it can meet bid criterion and secure request exactly. And the protocol also uses twice-mask and etc. which solve the problem of identity anonymity and legitimacy more perfectly. It not only make the bidder's identity information secret after twice-mask, and also insure the bidder's identity is legal and valid. After security and bid criterion analysis, we have simulated the protocol by Simulink of Matlab and implement it by VC++6 to verify its legitimacy and feasibility.By describing the inviting public bidding and bidding on net with cryptography technology, we know that the application of cryptography in the inviting public bidding and bidding on the net is feasible. The aim of this paper is to introduce cryptography technology to construction engineering and vice versa. And we also wish promotion of the two industry by communion and sharing of knowledge and technology.