Why do browsers show a lock icon?
Show answer & explanation
Answer: Connection is encrypted
Content cannot be copied — Wrong. HTTPS doesn't prevent copying. The lock shows encrypted connection—data transmitted between you and server is protected from eavesdropping.
Connection is encrypted ✓ — Correct! The lock icon indicates HTTPS (HTTP Secure)—encrypted connection using SSL/TLS protocols. Data exchanged (passwords, credit cards, messages) is scrambled so eavesdroppers can't read it. The lock also verifies site identity through certificates. HTTP (no lock) sends data in plaintext—vulnerable to interception. Always check for the lock on sensitive sites!
Site blocks malware — Wrong. HTTPS helps security, but the lock specifically means encrypted connection, not malware protection. Antivirus handles malware.