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Mixed
Glyph
Simple files
Lock, secure, privacy
Black
512x512
Free Misc Icon Set 2
security, safety, on
iOS7 optimized
Miu
locked, protect, security
security, secure, protect
PNG ICO ICNS MORE
Network & communications
Iconico
Code, password, locked
1024x1024
shopping website
locked, Key, key lock
256x256
Computer & hardware
Ionicons
locked
Pittogrammi
locked, Lock
Business & finance
Devine Icons Part 2
128x128
PNG MORE
Minicons Free
32x42
locked, un
45x45
UI
IconSweets
50x50
Travel & hotels
DOT pictograms
car rental, Parking, Car
Wireframe mono icons
Closed, Fixed, Lock
48x48