Sounds more technical than it really is. Website owner proves control of the domain, gets the certificate issued by a Certificate Authority, installs it on the server, and browsers can then create a secure connection.
Starting The Request
Owner picks a CA first. Some offer free certificates, others charge for extra features. Free’s perfectly fine for most ordinary websites honestly.
Server creates a private key, needs to stay secret since it’s part of the site’s identity. From that key it generates a Certificate Signing Request with info about the site and its public key.
Proving You Own The Domain
CA checks that whoever’s requesting the certificate actually controls the site, otherwise anyone could claim a domain they don’t own.
A DNS record added to the domain’s settings works. Email verification sometimes too depending on the CA. Or a small file placed on the site that the CA looks for at a specific address.
Getting It Issued And Installed
CA confirms ownership, creates and signs the certificate with the site’s public key and domain details. Browser later checks that signature against the CA’s trusted info to confirm it’s legit.
Installation’s automatic on a lot of hosting platforms. More hands on setups need the owner or developer to configure the files themselves.
Does It Last Forever
No, certificates expire. Renew before that date or browsers start showing warnings. A lot of hosting handles renewal automatically now, way better than relying on a calendar reminder six months out.
So the process is straightforward really. Create a CSR, prove domain control, get the certificate, install it. After that, HTTPS just quietly protects the connection. Funniest part’s that nobody ever notices it working.