Examining the PKI Topology of Cross Certified CAs

Cross-certifying represents another form of hierarchical PKI topology. This structure has a number of flat, single-root CAs. Each of these CAs establishes a trust relationship horizontally by cross-certifying its own CA certificates, as shown in Figure 14-7.

Figure 14-7 Cross-Certified CAs

Cross-Certified CAs:

• Mutual Cross-Signing of CA Certificates

Figure 14-7 Cross-Certified CAs

Cross-Certified CAs:

• Mutual Cross-Signing of CA Certificates

Brian Emily

End Users

Brian Emily

End Users

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