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Military Communications and Information Technology: A Trusted ...

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Chapter 2: <strong>Communications</strong> <strong>and</strong> <strong>Information</strong> <strong>Technology</strong> for <strong>Trusted</strong>...<br />

113<br />

An OpenDS is used as directory for certificates. It is based on the ACP 133 [20]<br />

format (ed. C or D) in order to be smoothly interoperable in the NATO context.<br />

Figure 4 shows an example of the CA structure (grayed out boxes) <strong>and</strong> an extract<br />

of the respective (Sub) CA certificate store.<br />

In the example Mission RootCA Straussberg forms the highest-level Root CA<br />

(layer 1). The SubCAs for operations (missions, layer 2) that may be located on a stationary<br />

IT system in the home country are derived from this Root CA.<br />

Figure 4. CA structure <strong>and</strong> extract of certificate store

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