SSL certificate chain terminology
Hierarchy
The certificate rank in the chain can be root, intermediate or end-user.
Common name
Validation type
The validation type can be at the domain or organization level or an extended validation.
Valid from and to
Date range during which the certificate is valid.
Subject
Who or what organization the certificate has been issued to.
Issuer
The Certificate Authority (CA) that issued the certificate.
Serial number
The certificate serial number a unique number issued by the CA in order to track revocation.
Signature
The signature of an SSL certificate is the algorithm that was used to sign the public key.
Purpose
Lists one or more purposes that the certificate can be used for.
Public key information
The type, size (in bits) and Privacy Enhanced Mail (PEM) format of the public key.
Extensions
This section lists all extensions associated with the certificate.