🔒 · Objects › Locks · Emoji 0.6 (2010)
🔒 is a closed padlock.
Security and privacy come first: a private account, a password, something locked away. In slang, being 'locked in' means fully focused, and a 🔒 can also mean a secret stays secret.
Paint with 🔒 in the emoji art editor, or turn any photo into emojis with the image to emoji converter.
U+1F512🔒\1F512\u{1F512}\U0001F512%F0%9F%94%92