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CompTIA Security+ All-in-One Exam Guide, Third Edition by Chuck Cothren, Roger Davis, Dwayne Williams, Gregory White, Wm. Arthur Conklin

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Tying Different PKIs Together

In some cases, more than one CA can be needed for a specific PKI to work properly, and several requirements must be met for different PKIs to intercommunicate. Here are some examples:

  • A company wants to be able to communicate seamlessly with its suppliers, customers, or business partners via PKI.
  • One department within a company has higher security requirements than all other departments and thus needs to configure and control its own CA.
  • One department needs to have specially constructed certificates with unique fields and usages.
  • Different parts of an organization want to control their own pieces of the network and the CA that is encompassed within it.
  • The number of certificates that need to be generated and maintained ...

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