Reconciling Privacy and Security in Pervasive Computing - The Case for Pseudonymous Group Membership

Wakeman, Ian, Chalmers, Dan and Fry, Michael (2007) Reconciling Privacy and Security in Pervasive Computing - The Case for Pseudonymous Group Membership. In: 5th International Workshop on Middleware for Pervasive and Ad-Hoc Computing, Newport Beach, Orange County, California, USA.

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Abstract

In this paper, we outline an approach to the identification of entities for access control that is based on the membership of groups, rather than individuals. By using group membership as a level of indirection between the individual and the system, we can increase privacy and provide incentives for better behaviour. Privacy comes from the use of pseudonyms generated within the group and which can be authenticated as belonging to the group. The incentives for better behaviour come from the continuous nature of groups - members may come and go, but the group lives on, and groups are organised so as to ensure group-longevity, and prevent actions which may harm the groups reputation. We present a novel pseudonym generation mechanism suitable for use in groups without a centralised administration. Finally, we argue that the use of group membership as the basis for formulating policies on interaction is more efficient for disconnected operation, facilitating proxies and the efficient storage of revoked membership and distrusted organisations within bloom filters for small memory footprints.

Item Type: Conference or Workshop Item (Paper)
Schools and Departments: School of Engineering and Informatics > Informatics
Depositing User: Ian Wakeman
Date Deposited: 06 Feb 2012 18:16
Last Modified: 29 Mar 2012 10:36
URI: http://srodev.sussex.ac.uk/id/eprint/15554
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