PNG ICO ICNS MORE
Computer & hardware
3D
FS Icons Ubuntu
realplaer, secure, Gnome
Black
512x512
3D icons
Lock, private, padlock
256x256
Luminight General Icons
Lock, secure
Discovery
realmedia, mime, realplaer
32x32
Human o2
security, Lock, Keyring
DimGray
128x128
password, Key, login
Silver