In network system there is a large amount of log audit data which contain much information related to security.

网络系统中存在大量的日志审计数据，在这些日志审计数据中含有许多与安全有关的信息。

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As an important data source reflecting the network security situation, logs affect the implementation of NSSA significantly, in the sense that it is important to make use of log-related data.

日志作为反映网络安全状况的重要数据源之一，对网络安全态势感知的实现有着关键的影响，如何做到对日志类数据的充分利用是非常关键的。

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