1. School of Computer Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Information Security Laboratory,Legend Corporation of R&D, Beijing 100085, China
The unigue security requirements of grids were described as well as the shortcoming of the existing technologies, a grid layered security architecture was developed which provides an integrated solution to fit all these grid security requirements, and some key techniques to achieve the grid security architecture such as single sign-on and security group communication were studied. Using this security architecture, a secure model for a shared electronic exchange was constructed which provides a security platform for electronic commerce.