Abstract: By exploring the process and analyzing the system security of E-opening sealed tenders system, this paper designs and realizes a secure and efficient construction project E-opening sealed tenders system.To meet the demands of safety and security of E-opening sealed tenders system, the design of security architecture is taken into account for this system. The system realizes user authentication and access control and ensures the integrity and security of bidding information in the course of transmitting and storing. The paper introduces implementations some special functions in the system, which is founded based on Delphi platform.

Key words: construction project, tendering and bidding, computer-aided, information security, Delphi platform