This feature is new in the Software Express pilot program and in the Solaris 9 8/03 release. This feature is included in the Solaris 10 3/05 release.
The Xscreensaver program locks your monitor screen after a period of inactivity in order to prevent others from gaining access to your system session. Xscreensaver supports a variety of animation displays that can be used while the screen is locked. This program is used in the Java Desktop System.
See the xscreensaver(1) man page for further information.