Padlock Icon - Security Symbol for Websites and Applications #3768557 (License: Personal Use)

This vector-style padlock illustration features a bold black outline with a rounded rectangular body and a U-shaped shackle. A centered keyhole symbol reinforces its association with access control and authentication. The design is universally recognizable and scalable for use across digital interfaces.

Commonly used on websites to indicate HTTPS/SSL encryption, secure login forms, privacy policies, or locked content areas; matches user intent for safety assurance and trust signals.