Cryptology ePrint Archive: Report 2005/170

Unclonable Group Identification

Ivan Damg{\aa}rd and Kasper Dupont and Michael {\O}stergaard Pedersen

Abstract: We introduce and motivate the concept of unclonable group identification, that provides maximal protection against sharing of identities while still protecting the anonymity of users. We prove that the notion can be realized from any one-way function and suggest a more efficient implementation based on specific assumptions.

Category / Keywords: ryptographic protocols, protocols, privacy, anonymity, identification schemes

Date: received 10 Jun 2005, last revised 16 Nov 2005

Contact author: ivan at daimi au dk

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Version: 20051116:092839 (All versions of this report)

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