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In this paper we propose an ID management scheme with user privacy protection. The scheme contributes to reducing the ID management cost for a large-scale network. TTP (trusted third party) based authentication services have a problem in user ID handling in that a TTP has to manage a large amount of user DDs for their service. Our proposed scheme minimizes the data volume that a TTP has to retain by using a cryptographic technique. We also describe the evaluation results for a prototype system based on a realistic environment where TTPs cooperate in providing the authentication service.
Date of Conference: 27-30 Nov. 2006