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Signs & symbols
Smooth
Super Mono Basic
red, shield, Basic
Crimson
48x48
shield, Basic, yellow
Orange
UI
Pixel
Blueberry
protect, on, shield
OliveDrab
32x32
protect, shield, off
OrangeRed
Avatars & smileys
Cartoon
UltraBUUF
shield, Cap
Black
512x512
shield
Desktop apps
Farm-fresh
shield, Add
SandyBrown
shield, delete
shield, Go
Mixed
48px web iconset
DarkGray
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Super Mono Stickers
sticker, shield
DarkSlateGray
64x64
Shopping & e-commerce
Super Mono Reflection
shield, Blue
DeepSkyBlue
green, shield
red, shield
yellow, shield
3D
Bright
Protection, Blue, shield
SteelBlue
Protection, shield, red
Protection, shield, green
YellowGreen
Protection, shield
Glyph
16x16 Free Toolbar Icons
protect, Antivirus, yellow
Khaki
16x16
gcons
DimGray
Isloo
128x128
Business & finance
Refresh CL
shield, Firewall, Check
256x256