By the development of computer science and network technology, the circumstances on the security of information and network are increasingly rigorous.

随着计算机信息技术与网络技术的迅猛发展，信息与网络的安全形势也日趋严峻和复杂化。

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To do research on the information network security technology and standard and develop the relevant security products and to be engaged in the security service work.

进行信息网络安全技术和标准的研究，开发相应的安全产品，并从事安全服务工作。

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This project design and implementation the new security instant messaging based on the topic of the existing network communication technology, database technology and information security technology.

本课题在现有的网络通信技术、数据库技术和信息安全技术的基础上设计并实现了新型的安全即时通信系统。

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