JCA设计的主要原理是将密码概念从算法实现中分离出来，以便不同的供应商可以在JCA框架内提供他们的工具。

The primary principle of JCA design is to separate cryptographic concepts from algorithmic implementations, so that different vendors can offer their tools within the JCA framework.

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由于发现了认证算法中存在的缺点，或者由于系统认证需求的变化，有时候需要更改认证框架的组件。

Its components may have to be changed due to deficiencies found in the authentication algorithms or to changes in requirements for system authentication.

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这需要不同的测试检测算法，在下面讨论的框架中就会看到。

This requires a different test detection algorithm, as you will see as you now turn your attention to these frameworks.

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