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Business & finance
Flat
Business Productivity (Set 1)
encryption, password, Lock
Gainsboro
512x512
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Office Vol.4
Protection, password, Lock
Coral
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Winter Lollipop
Lock, password, Protection
SkyBlue
374x374
Glyph
Gentle Edges Icon Set
Key, password
Black
128x128
Wireframe mono icons
black key, password, Lock
48x48
3D
Seven General Icons
Lock, password, secure
256x256