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Communication Dans Un Congrès Année : 2019

Fast Keyed-Verification Anonymous Credentials on Standard Smart Cards

Jan Camenisch
  • Fonction : Auteur
  • PersonId : 1153488
Manu Drijvers
  • Fonction : Auteur
  • PersonId : 1153489
Petr Dzurenda
  • Fonction : Auteur
  • PersonId : 1153490
Jan Hajny
  • Fonction : Auteur
  • PersonId : 1153491

Résumé

Cryptographic anonymous credential schemes allow users to prove their personal attributes, such as age, nationality, or the validity of a ticket or a pre-paid pass, while preserving their privacy, as such proofs are unlinkable and attributes can be selectively disclosed. Recently, Chase et al. (CCS 2014) observe that in such systems, a typical setup is that the credential issuer also serves as the verifier. They introduce keyed-verification credentials that are tailored to this setting. In this paper, we present a novel keyed-verification credential system designed for lightweight devices (primarily smart cards). By using a novel algebraic MAC based on Boneh-Boyen signatures, we achieve the most efficient proving protocol compared to existing schemes. To demonstrate the practicality of our scheme in real applications, including large-scale services such as public transportation or e-government, we present an implementation on a standard, off-the-shelf, Multos smart card. While using significantly higher security parameters than most existing implementations, we achieve performance that is more than 44% better than the current state-of-the-art implementation.
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hal-03744308 , version 1 (02-08-2022)

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Jan Camenisch, Manu Drijvers, Petr Dzurenda, Jan Hajny. Fast Keyed-Verification Anonymous Credentials on Standard Smart Cards. 34th IFIP International Conference on ICT Systems Security and Privacy Protection (SEC), Jun 2019, Lisbon, Portugal. pp.286-298, ⟨10.1007/978-3-030-22312-0_20⟩. ⟨hal-03744308⟩
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