Based on the practical requirements of the electronic bidding system,the concept of special threshold secret sharing is proposed,which owns the features and properties of that the designated person must participate,that a group acts as a unit,or that the designated group must participate.

On the application of the E-bidding in the bidding market of the road construction;

In this paper,we analyze some problems about the security of e-bidding system,and which would be solved preferably through introducing the new identity authentication,especially improving the secret sharing scheme based on Shamir s thought.

With the rapid development of Internet, E-bidding is widely applied to the purchase of government and enterprise.

An analysis is made of the conditions for the application of electronic employment in China s enterprises:the development of network,and particularly,the development of talent websites;the improved level of informationization in enterprises;and wide social acceptance of electronic employment.