Simple definition
HTTPS protects the data exchanged between the browser and the site and usually displays a lock.
Technical definition
The TLS session checks the server certificate and negotiates encryption keys. HTTP is then transported in this secure channel, usually on the port TCP 443.
What is it used for ?
Protecting connections to sites, administration interfaces and API.
Practical example
Identifiers sent to WordPress are encrypted during their transit through HTTPS.
Common issues
- Expiration or incorrect certificate
- Mixed content loaded in HTTP
- Redirection HTTPS misconfigured
- Former TLS protocol still enabled
Related terms
HTTP · SSL/TLS certificate · Encryption · DNS · Network port
Key takeaway: This entry explains the general operation of the term. Exact settings may vary depending on software, vendors and environments.