Jacob Y. Levy

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Safe-Tcl is a mechanism for controlling the execution of programs written in the Tcl scripting language. It allows untrusted scripts (applets) to be executed while preventing damage to the environment or leakage of private information. Safe-Tcl uses a padded cell approach: each applet is isolated in a safe interpreter where it cannot interact directly with(More)
Electronic commerce needs electronic meeting places to conduct business. To be useful, such meeting places must be safe for all participants and for hosts (owners of places). In this paper we discuss safety issues for participants and hosts. We then describe a system we are building, Safe Tcl, that will allow the construction of electronic meeting places(More)
A mobile-agent system is one where user programs (the agent) may voluntarily and autonomously migrate from one computer (the host) to another (the mobile agent server). A large deployment of mobile agent systems is not possible without satisfying security architecture. The major obstacle facing wide deployment of mobile agents is the attack of a visiting(More)
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