Lock (Apple)

Represented with a distinct glossy sheen and robust form on Apple devices, the locked emoji appears as a sturdy padlock with a clear, well-defined keyhole. Apple's design language imbues it with a sense of security and finality, utilizing smooth gradients and soft rounded edges to give it a tactile, reassuring presence. This emoji is universally understood to convey privacy, safety, protection, or the completion of a task.