本模型不仅适用于实时的、大数据传输的网络系统，而且实现了密钥管理、加密管理、数字签名以及身份认证等功能。

The model not only realizes key management, encrypted communication, digital signature and identity authentication, but also is fit for network system with real time and large data transfer.

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针对分布式环境下的数据分发和管理问题，以智能卡与口令作为身份认证与密钥交换的基础，设计一个分布式数据传输安全模型。

To solve the problem of data distribution and management in the distributed environment, this paper proposes a secure communication model based on smart card and password authentication.

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