ISSN : 1796-203X
Volume : 2    Issue : 2    Date : April 2007

p-Trust: A New Model of Trust to Allow Finer Control Over Privacy in Peer-to-Peer Framework
Sudip Chakraborty and Indrajit Ray
Page(s): 13-24
Full Text:
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Every time a user conducts an electronic transaction over the Internet a wealth of personal
information is revealed, either voluntarily or involuntarily. This causes serious breach of privacy for
the user, in particular, if the personally identifying information is misused by the other users present
in the network. Ideally, therefore, the user would like to have a considerable degree of control over
what personal information to reveal and to whom. Researchers have proposed models to allow a
user to determine what personal information to reveal while doing a transaction over the Internet.
However, these models do not help the user in determining who to trust, how much to trust and why
to trust them with the personal information. The models fail to address loss of privacy through the
misuse of information. In this paper we propose a privacy enhancing trust model to measure the
degree of confidence that a user can have in the context of preservation of her privacy during a
transaction. The model considers several factor while computing trust which include a user’s own
experience and knowledge about the target user and feedback obtained from groups of peer users
called ‘trusted neighbors’ and ‘friends’. The proposed scheme provides a flexible and powerful
approach for the secure handling of private data and offers a user considerable control over how
she wishes to disseminate her personal data.

Index Terms
Security, trust, privacy, peer-to-peer network.