Look closer
Everything above is computed from these. Open whichever you want; none of it is needed to follow the lesson.
X.509 · TLS 1.3 · what the padlock means
Parses the certificate a real site presented, walks the chain to a root that was trusted before you arrived, and lets you break each check in turn — then shows you a flawless certificate for a name that is not your bank.
Everything above is computed from these. Open whichever you want; none of it is needed to follow the lesson.