ZKlaims: Privacy-preserving Attribute-based Credentials using Non-interactive Zero-knowledge Techniques

Martin Schanzenbach, Thomas Kilian, Julian Schütte, Christian Banse

2019

Abstract

In this paper we present ZKlaims: a system that allows users to present attribute-based credentials in a privacy-preserving way. We achieve a zero-knowledge property on the basis of Succinct Non-interactive Arguments of Knowledge (SNARKs). ZKlaims allow users to prove statements on credentials issued by trusted third parties. The credential contents are never revealed to the verifier as part of the proving process. Further, ZKlaims can be presented non-interactively, mitigating the need for interactive proofs between the user and the verifier. This allows ZKlaims to be exchanged via fully decentralized services and storages such as traditional peer-to-peer networks based on distributed hash tables (DHTs) or even blockchains. To show this, we include a performance evaluation of ZKlaims and show how it can be integrated in decentralized identity provider services.

Paper Citation

in Harvard Style

Schanzenbach M., Kilian T., Schütte J. and Banse C. (2019). ZKlaims: Privacy-preserving Attribute-based Credentials using Non-interactive Zero-knowledge Techniques.In Proceedings of the 16th International Joint Conference on e-Business and Telecommunications - Volume 2: SECRYPT, ISBN 978-989-758-378-0, pages 325-332. DOI: 10.5220/0007772903250332

in Bibtex Style

@conference{secrypt19,
author={Martin Schanzenbach and Thomas Kilian and Julian Schütte and Christian Banse},
title={ZKlaims: Privacy-preserving Attribute-based Credentials using Non-interactive Zero-knowledge Techniques},
booktitle={Proceedings of the 16th International Joint Conference on e-Business and Telecommunications - Volume 2: SECRYPT,},
year={2019},
pages={325-332},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007772903250332},
isbn={978-989-758-378-0},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 16th International Joint Conference on e-Business and Telecommunications - Volume 2: SECRYPT,
TI - ZKlaims: Privacy-preserving Attribute-based Credentials using Non-interactive Zero-knowledge Techniques
SN - 978-989-758-378-0
AU - Schanzenbach M.
AU - Kilian T.
AU - Schütte J.
AU - Banse C.
PY - 2019
SP - 325
EP - 332
DO - 10.5220/0007772903250332