PNG ICO ICNS MORE
Network & communications
Glyph
Iconico
Code, password, locked
Black
1024x1024
Pixel
16x16 Free Application Icons
secure, Log in, pass
16x16
Key, Log in, login
Lock, security, pwd
Smooth
Oxygen
Log in, password, Lock
Tan
128x128
Lock, Unlock, password
LightGray
48x48
Keys, password, Lock
delete, Key, password
password