Top-level certificate, called the Root Certificate Authority (CA)
A subordinate CA, which is the Sun Microsystems Inc., CA Class B certificate.
An additional certificate issued by Sun EnterpriseTM Services, called the patch management certificate
A certificate authority certifies the relationship between public keys that are used to decrypt the digital signature with the patch and the owner of the public keys.
The Sun Root CA, Sun Class B CA, and the patch signing certificate are included with the Solaris patch management tools, including PatchPro. These three certificates provide a certificate chain of trust in the patch verification process whereby the Sun Root CA trusts the Class B CA, and the Class B CA trusts the patch management certificate. And, ultimately, the GTE CyberTrust CA trusts the Sun Root CA.