[>_] ROOM · Web
What HTTPS guarantees, how certificates and the TLS 1.3 handshake work, and how to read a certificate and diagnose the errors customers report.
// about
HTTPS is HTTP inside a TLS connection, and this room takes that connection apart. You learn what TLS protects on a shared network and what it leaves visible, how keys, certificates and certificate authorities fit together, and what each message of the TLS 1.3 handshake does. You then read a certificate field by field, work out days to expiry from the terminal, and tell an expired certificate from a name mismatch, a missing intermediate, a wrong clock and mixed content. The room ends with a guided lab in which you build a certificate inventory for five Fernhill hosts.
Each task’s Rep is set individually — beginner tasks average +10. The +90 room bonus unlocks at 100%.