PNG SVG MORE
Sports & awards
Flat
theSquid.ink 40
Umbrella, weather, Protection
Black
442x512
PNG ICO ICNS SVG MORE
Eyes, Accessories, Protection
512x512
Mixed
Glyph
Social Messaging & Productivity Mix Icons
handrawn, files, documents
UI
Outline
Watchify v1.0 - 70px
security, Lock, Protection
Watchify v1.0 - 32px
Protection, Lock, secure
Very Basic. Android L (Lollipop)
secure, protect, Key
Unique-Round-Blue
Unlock, password, Safe
DeepSkyBlue
PNG ICO ICNS MORE
Mobile apps
app types in grey
Safe, security, secure
DarkSlateGray
Internet and web
Guard, safety, protect
PNG MORE
iconsimple (freebies)
Umbrella, weather, forecast
480x512
Stash
Protection, secure, shield
DimGray
Windows 8 metro style
Data, Protection
Gaming & gambling
3D
Free Game Icons
Armour, Protection, helm
64x64
privacy, locked, Restriction
Antivirus, locked, secure
protect, secure, security
Avatars & smileys
Free Large Boss Icon Set
police officer, Officer, Captain
shield, Protection, police
stupid, strong, power
shiled, stupid, strong
knight, horseman, king
Photography & graphic design
32x32 Free Design Icons
locked, Key, secure
32x32
Key, password, login
Photorealistic
48x48 Free Object Icons
locked, Hide, login
48x48