Trust management for e-transactions |
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Authors: | Vishwas Patil R K Shyamasundar |
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Affiliation: | (1) School of Technology and Computer Science, Tata Institute of Fundamental Research, Homi Bhabha Road, 400 005 Colaba, Mumbai, India |
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Abstract: | There has been enormous increase in transactions and cooperative-computing services on the internet. This is both a technical
and a social phenomenon. Transactions and services over the internet have global reach and users, known or unknown to the
service provider, might be interested in availing access or participating in the cooperative transaction in a distributed
manner. Thus, it is very important for service providers to identify and establish trustworthiness of potential collaborators,
which they do by writing contracts (e.g. access control, security policies; the words contract and policy are used interchangeably)
without violating the privacy and confidentiality laws that prevail across geographical boundaries. But as the system becomes
complex and dynamic, contractual incompleteness arises since it becomes cumbersome to mention potentially large set of outcomes
of the user's choice of action. Trust plays a crucial role in the design of optimal contracts; not all the relevant, valuable
information on the user's choice of action is incorporated in the equilibrium contract. It may also be noted in that traditional
transactions, the notion ofseeing is believing plays a vital role. However, in e-transactions, this is not the case. The challenge is to see how in such a scenario trust
can indeed be generated. Note that the presence of trust facilitates cooperative behaviour and allows for exchange to occur
in situations where its absence would preclude trade. In this paper, we shall present a comparative analysis of various approaches
of trust management in practice that integrates technology with other factors. We shall also bring out the relative deficiencies
and how these issues are tackled in our ongoing work that facilitates execution of optimal contracts. |
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Keywords: | e-Commerce security trust management access control PKI |
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