Sun Microsystems plans to phase out its Trusted Solaris secure operating system and replace it with security extension software that can be used with its OpenSolaris operating system, said Mark Thacker, product line manager of Solaris security. OpenSolaris and the Solaris Trusted Extensions software will provide the full functionality of Trusted Solaris, according to Thacker. “This product will simply layer on top of Solaris 10. It will run on top of any piece of hardware that Solaris 10 runs on,” Thacker said. Trusted Extensions should be available by mid-2006.