A Note on the Confinement Problem
Butler W. Lampson
Citation: A note on the confinement problem. Comm. ACM 16, 10 (Oct. 1973), pp 613-615.
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This note explores the problem of confining a program during its execution so that it cannot transmit information to any other program except its caller. A set of examples attempts to stake out the boundaries of the problem. Necessary conditions for a solution are stated and informally justified.