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Signs & symbols
Glyph
Web UI
Safe, Circle, privacy
Black
512x512
Web UI color
green, Lock, secure
LightSeaGreen
Travel & hotels
Travel and Leisure Vol 1
Do not disturb, private, privacy
Mixed
Simple files
Lock, secure, privacy
Free Misc Icon Set 2
security, safety, on
Lock, privacy, off
UI
Very Basic. Android L (Lollipop)
private, Lock, protect
Unique-Round-Blue
Unlock, password, Safe
DeepSkyBlue
Picol Vector
Data, privacy
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Business & finance
Duesseldorf
Lock, private, login
DarkSlateGray
32x32