As shown in Figure 6, the core layer starts with security policies and procedures as a foundation.

如图6中所示，核心层以安全策略和过程作为基础。

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Likewise, changes to access controls require changes to built-in access mechanism in the core layer.

类似地，对访问控制的更改要求更改核心层中的内置访问机制。

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For instance, changes to cryptography in the core layer require changes to the cryptographic controls, and vice versa.

例如，对核心层的加密技术的更改要求对加密控制进行更改，反之亦然。

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In other words it a vertical add-on, or a horizontal core component layer?

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"A polyester reinforcement at the core with probably a polythene layer around that, " Garvey said.

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The result is not unlike what you get when you broil a steak: a darkened, cooked outer layer, with a lighter core.

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