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Mixed
3D
Momentum Glossy icons
delete, shield
DarkGray
32x32
shield
Info, shield
Bright
Protection, Blue, shield
SteelBlue
512x512
Protection, shield, red
Black
Protection, shield, green
YellowGreen
Protection, shield
SandyBrown
Isloo
OliveDrab
128x128
Business & finance
Refresh CL
shield, Firewall, Check
256x256
Travel & hotels
Travel Icons
shield, swords
Vista Style Base Software
shield, green, Protected
shield, Antivirus, Protection
RoyalBlue
Protection, Antivirus, green
grey, shield
Silver
Protection, shield, Antivirus
grey, warning, shield
The Spherical icon set
shield, globe
MidnightBlue
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Desktop apps
Free Applications Icons
Lock, clef, private
24x24
Log in, private, password
Key, private, login
Protection, secured, private
Computer & hardware
Human o2
shield, Breach, security
DarkRed
Iconza
shield, Antivirus
DarkSlateGray