| In order to meet the business needs of cross regional coordination office of the enterprise group,to achieve interoperability between the members of the unit,convenient exchange,information resources between the internal and the members of the unit together,and improve work efficiency and reduce office cost,we design and implement a secure communication platform,multi-level architecture can the enterprise group to realize the unified information exchange and coordination office,finally between each unit through the unified security communication platform,the enterprise group headquarters and the members of the unit can mutual visit,mutual trust and mutual control the data resource with each other.Unified secure communication platform mainly consists of two subsystems,secure e-mail system and secure instant messaging system.The two subsystem uses common identity authentication and process control module,and can be integrated with the user’s multiple applications as a unified security portal for the user information system.Secure instant messaging system provides a number of service functions,such as enterprise address book,instant messaging,file transfer,uniform application portal and so on.The security management and audit of file exchange can be realized through information encryption and process approval.Security e-mail system solves the internal transmission and transmission in the process of controlled problems,to achieve the user classification setting,the message and its attachments standard dense,sending approval,conduct and audit content,operation log management,system configuration management of a number of function,also can be combined with PKI,in the traditional e-mail system introduced digital envelope,digital signature,the algorithm of information encryption technology,so as to realize the encryption of e-mail transmission,storage encryption,and the ability to verify the identity of the sender to ensure message integrity and non repudiation.Can be integrated with the secure instant messaging system.In the development of the project,we have analyzed the user’s requirement of the security e-mail system and the security instant communication system,and designed and implemented the two subsystems respectively. |