What does the 'https' in a web address indicate?

Concept

HTTP defines the application-level request-and-response semantics used on the Web. HTTPS uses those HTTP semantics through a channel secured by TLS; the security layer authenticates the origin server and protects the confidentiality and integrity of the communication.

Therefore, the distinguishing information conveyed by the https URI scheme is the protected transport channel, not the website category or the physical location of its server.

Application

The stem asks what the letters “https” in the address indicate. Among the offered statements, “The website is secure using encryption” is the conventional best match: more precisely, the browser-to-origin connection is protected by TLS encryption and integrity checks.

Contrast

• “The website is hosted on a local server” concerns deployment location; an https address does not encode whether hosting is local or remote.

• “The website is a search engine” concerns the service’s purpose; the same URI scheme is used by many kinds of websites.

• “The website uses standard HTTP protocol” contains a limited technical truth because HTTPS still carries HTTP messages, but it does not state what the added “s” indicates. The distinguishing property is that the HTTP communication is secured through TLS.

Cross-check

RFC 9110 defines an https origin as capable of establishing TLS for HTTP communication and explains that “secured” includes server authentication plus confidentiality and integrity protection. It also avoids a common overstatement: HTTPS protects the connection, but it does not by itself guarantee that all website content or business practices are trustworthy.

Result

The https scheme indicates TLS-secured HTTP communication, so the best offered answer is “The website is secure using encryption.”