In this paper, we propose a grid security infrastructure based on identity cryptography. We mainly discuss the grid security authentication and authorization architecture by using Tate Pairing. We propose a private key generator security infrastructure and secure group communication scheme by using non-interaction secret sharing protocol and one round tripartite Diffie-Hellman protocol. Finally, we present the advantages and disadvantages of our ID-based security infrastructure comparing with the public key infrastructure in grid circumstance.
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