PNG ICO ICNS MORE
Security
secrecy
Black
256x256
Gaming & gambling
3D
Free Game Icons
secure, Authentication, password
64x64
login, secrecy, Golden
Network & communications
Pixel
16x16 Free Application Icons
secure, Log in, pass
16x16
Key, Log in, login
Lock, security, pwd
Desktop apps
Glyph
16x16 Free Toolbar Icons
password, Close, secrecy
PNG MORE
Free Applications Icons
Lock, clef, private
24x24
Log in, private, password
Key, private, login