HTTP Secure

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Extra layer of encryption, using SSL/TLS

Looking at wikipedia as an example, we see Issued by: GlobalSign Organization Validation CA

The issuer in this case is an intermediate certificate authority

The intermediate certificate authorities are owned by the root certificate authority. These are trusted using some other mechanism, such as secure physical distribution.

This forms a chain of trust from a certificate chain.

P12 cert is a file format for storing multiple cryptographic objects, or simply one private key and its associated certificate chain