PNG ICO ICNS MORE
Fugue
security, about, shield
RoyalBlue
16x16
question, protect, help
Base Software
Blue, Guard, Protection
256x256
Blue
security, shield, protect
48x48
PNG MORE
Mixed
Pixel
Simply 8-bits #6
Hylian, shield
96x96
3D
Vista Style Base Software
shield, Antivirus, Protection
UI
Fugue Icons
Information, shield
question, shield