Abstract
An innovative application for communication platform based on SIP protocol is presented in this paper. In this application, a group management model is proposed for SIP with grouping functions. A new encryption mechanism that combines AES and RSA algorithm is included in this model to ensure the security of SIP messages. Different from the traditional application based on SIP, the architecture of this new platform requires a data service node to store the configuration list of the group management and the public key of RSA. Additionally, a methodology for NAT/FW traversal by using ICE and HTTP tunnel is applied to enhance the adaptability of the platform in different application environment. Finally, this communication platform is implemented with a user agent (UA), a SIP server (option), and a data service node. And the experience with the platform shows that, it could be widely utilized in enterprises, groups and organizations with low-cost because of those improvements.
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