Security problems in application layer multicast communication oriented to grid-based large scale military simulation applications are discussed. On the basis of grid services and security architecture, the mechanism of grid secure multicast services (GSMS) is proposed. GSMS provide functions of access control and group key management to ensure the confidentiality, integrity and non-repudiation of the multicast information in the multicast communication, and also enable the abilities to examine the system status, inspect abnormity, log the system, enhance system security and improve the capability to resist attack. Finally, an application instance is used to validate the ability of GSMS in Globus Toolkit 3.2 platform, indicating the usability of GSMS.
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