Nested Java Processes: OS Structure for Mobile Code
The Flux Research Group
Department of Computer Science
University of Utah
50 S. Central Campus Drive Rm. 3190
Salt Lake City, Utah 84112-9205
The majority of work on protection in single-language mobile code
environments focuses on information security issues and depends on the
language environment for solutions to the problems of resource
management and process isolation. We believe that what is needed in
these environments are not ad-hoc or incremental changes but a
coherent approach to security, failure isolation, and resource
management. Protection, separation, and control of the resources used
by mutually untrusting components, applets, applications, or agents
are exactly the same problems faced by multi-user operating systems.
We believe that real solutions will come only if an OS model is
uniformly applied to these environments. We present Alta,
our prototype Java-based system patterned on Fluke, a highly
structured, hardware-based OS, and report on its features appropriate
to mobile code.
Full paper presented at and appears in
Proceedings of the
Eighth ACM SIGOPS European Workshop,
Sintra, Portugal, September 1998.