Cryptology ePrint Archive: Report 2017/1022

Direct Anonymous Attestation from Lattices

Rachid El Bansarkhani and Ali El Kaafarani

Abstract: Direct Anonymous Attestation (DAA) is a complex cryptographic protocol that has been widely deployed in practice, with more than 500 million machines in the market that are already equipped with its hardware, the so-called Trusted Module Platform (TPM). While formalizing the right security model for such a complex protocol has triggered a dense line of research, all the proposed DAA schemes so far are based on number-theoretic problems that are known to be vulnerable to quantum computer attacks. In this paper, we propose the first lattice-based DAA scheme that is secure w.r.t. the most up-to-date security model proposed by Camenisch et al. More precisely, our lattice-based DAA scheme is secure in the Universally Composable (UC) security model. Furthermore, we give (amongst others) the first lattice-based DAA scheme providing user controlled linkability that is realized by means of a new lattice-based MAC/TAG construction which could be of independent interest.

Category / Keywords: public-key cryptography / Lattice-based Cryptography, Anonymous Signatures, DAA

Date: received 14 Oct 2017

Contact author: elbansarkhani at cdc informatik tu-darmstadt de

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Version: 20171025:025201 (All versions of this report)

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