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Privacy-enhanced identity via browser extensions and linking services

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3 Author(s)
Accornero, R. ; Dipt. di Inf., Univ. degli Studi di Torino, Turin, Italy ; Rispoli, D. ; Bergadano, F.

Identity Management systems come with a promise of simpler, centralized, and more secure handling of user data, credentials and authorizations. Service providers can thus be separated from an identity provider (IdP), and users will benefit from single sign on mechanisms. However, identity providers become single points of failure, from a security and trust perspective. In particular, in this paper, we address the protection of user privacy against IdPs profiling. The IdP should not be aware of which services the user will access, or about the details of such service use. This paper discusses the difficulties of this type of privacy protection problem and surveys existing solutions. We then identify a novel solution and improve an existing one: (1) moving part of the access management logic to the client, via a Web Browser extension, and (2) elaborating on previously proposed solutions based on the concept of a linking service, i.e. a server separated from the IdP and from the Service Provider, that will perform some of the authentication steps. Proof of the principle implementations of both solutions are made available to the user.

Published in:

Network and System Security (NSS), 2011 5th International Conference on

Date of Conference:

6-8 Sept. 2011

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