Browsing by Author "Karnik, Neeran M."
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Item Design of Ajanta System for Mobile Agent Programming(2001-11-20) Tripathi, Anand; Karnik, Neeran M.; Ahmed, Tanvir; Vora, Manish K.; Pathak, Mukta; Prakash, Arvid; Kakani, VineetWe describe the architecture and programming environment of Ajanta, a Java-based system for programming applications using mobile agents over the Internet. Agents are mobile objects which are hosted by servers on the network. Ajanta provides primitives for creating and dispatching agents, securely controlling agents at remote sites, and transferring agents from one server to another. For secureaccess to server resources by visiting agents, a proxy-based access control mechanism is used. The Ajanta design includes mechanisms to protect an agent's state and prevent misuse of its credentials. We describe in this paper migration patterns for programming an agent's travel path. A pattern encapsulates the abstract notion of agent mobility. Pattern composition allows one to build complextravel plans using some basic migration patterns. Finally,we present three agent-based distributed applications implemented using the Ajanta system. These include a middleware for sharing files over the Internet, a distributed calendar management system, and an agent-based middleware for distributed collaborations.Item Protection in a Mobile Agent System(1997) Tripathi, Anand R.; Karnik, Neeran M.Security is perceived as the major obstacle to the widespread acceptance and deployment of mobile agent systems in an open, distributed environment such as the Internet. Two fundamental problems in such systems are, the protection of host resources from agents visiting from untrusted domains, and the protection of agent contents from malicious hosts. This pa.per only addresses the resource protection problem in a mobile agent system implemented using Java objects. This involves the creation of separate protection domains for visiting agents, and granting them controlled access to host resources.We review several approaches for protecting resources, and discuss our design of a proxy-based mechanism for addressing this problem. We use elements of the Java security model and its class-hierarchy based type model in developing this design.Item System Support for Mobile Agents(1997) Karnik, Neeran M.; Tripathi, Anand R.Mobile objects can be used as a basis for supporting the mobile agents paradigm, which provides an interesting new approach for network-centric programming. We examine the language-level features needed for such applications, and describe a Java object-based mobile agent architecture that can provide system-level support for those features. Security is usually a major concern with mobile agent systems. We discuss security related issues such as authentication of mobile agents, protection of resources and privacy of communications, in the context of our architecture.