PNG ICO ICNS MORE
Gaming & gambling
3D
Free Game Icons
Antivirus, locked, secure
Black
64x64
login, secrecy, Golden
protect, secure, security
Avatars & smileys
Free Large Boss Icon Set
stupid, strong, power
512x512
shiled, stupid, strong
Business & finance
Free Large Business Icons
Safe, Foolproof, strongbox
strongbox, Foolproof, Sure
Photography & graphic design
32x32 Free Design Icons
locked, Key, secure
32x32
Key, password, login
Photorealistic
48x48 Free Object Icons
locked, Hide, login
48x48
security, privacy, Restriction
private, Protection, security
Antivirus, Guard, Army
Unlock, Safe, secure
Protection, Close, Safe
Khaki
security, Lock, secure
Unlock, Key, locked
Network & communications
Pixel
16x16 Free Application Icons
secure, Log in, pass
16x16
Key, Log in, login
Lock, security, pwd
Glyph
Gentle Edges Icon Set
Lock, secure
128x128
secure, Unlocked
PNG ICO ICNS SVG MORE
Mixed
Pittogrammi
Key, secure
Iconza
secure, locked