HP LaserJet Enterprise MFP - CA Certificates for commercial Email services (white paper)
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Appendix 3: Certificate Chaining
When used in the real world, Certificate Authorities delegate the signing of certificates to other
Certificate Authorities. Each such intermediate (or subordinate) Certificate Authority uses a
certificate issued by the root CA (or an intermediate) to sign and issue certificates. In the real
world, certificates form a chain between the identity certificate presented by the end-entity
and the root CA certificate. See the following example:
A) An identity certificate is presented by smtp.gmail.com.
Figure 10: smtp.gmail.com in Subject field
B) It was issued by the CA Google Internet Authority.
Figure 11: CA Google Internet Authority in Subject field