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The Computer Journal 1986 29(4):289-299; doi:10.1093/comjnl/29.4.289
© 1986 by British Computer Society
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The Design of a Capability-Based Distributed Operating System

S. J. Mullender1 * and A. S. Tanenbaum2 §

1 Centre for Mathematics and Computer Science, Kruislaan 413, 1098 SJ Amsterdam, The Netherlands, 2 Department of Mathematics and Computer Science, Vrije Universiteit, Amsterdam, The Netherlands

Fifth-generation computer systems will use large numbers of processors to achieve high performance. In this paper a capability-based operating system designed for this environment is discussed. Capability-based operating systems have traditionally required large, complex kernels to manage the use of capabilities. In our proposal, capability management is done entirely by user programs without giving up any of the protection aspects normally associated with capabilities. The basic idea is to use one-way functions and encryption to protect sensitive information. Various aspects of the proposed system are discussed.

Received November 1984.

* Centre for Mathematics and Computer Science, Kruislaan 413, 1098 SJ Amsterdam, The Netherlands

§ Department of Mathematics and Computer Science, Vrije Universiteit, Amsterdam, The Netherlands


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