Security without identification: transaction systems to make big brother obsolete
Communications of the ACM
Rethinking Public Key Infrastructures and Digital Certificates: Building in Privacy
Rethinking Public Key Infrastructures and Digital Certificates: Building in Privacy
Design and implementation of the idemix anonymous credential system
Proceedings of the 9th ACM conference on Computer and communications security
User-centric identity governance across domain boundaries
Proceedings of the 5th ACM workshop on Digital identity management
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User-privacy in existing identity management systems (IMS) can be improved.Indeed, private credential systems offer privacy enhancing capabilities not yet included in current IMS; e.g. proving claims such as age 18, with age an attribute. This paper introduces privacy enhanced claim URIs which enable to request personal data in a privacy friendly way. We show how many private credential capabilities can be achieved in current IMS without using private credentials and continue by showing how these URIs allow integration of private credential systems in Microsoft Cardspace. Since our approach is very simple and widely applicable, it allows to enhance privacy friendliness of today's online transactions.