This requires that you move from traditional, static security models to dynamic models that can keep up with the accelerated rate of change in an SOA architecture.

这就要求从传统的静态安全模型转向动态模型，以跟上SOA体系结构中更快的变更速度。

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Traditional access control models, including MAC model and DAC model, have no longer been able to meet the security need of contemporary systems.

传统的访问控制模型——MAC模型和DAC模型，已远不能满足当代系统安全的需要。

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