---
_id: '3265'
abstract:
- lang: eng
text: "We present CLARC (Cryptographic Library for Anonymous Reputation and Credentials),
an anonymous credentials system (ACS) combined with an anonymous reputation system.\r\n\r\nUsing
CLARC, users can receive attribute-based credentials from issuers. They can efficiently
prove that their credentials satisfy complex (access) policies in a privacy-preserving
way. This implements anonymous access control with complex policies.\r\n\r\nFurthermore,
CLARC is the first ACS that is combined with an anonymous reputation system where
users can anonymously rate services. A user who gets access to a service via a
credential, also anonymously receives a review token to rate the service. If a
user creates more than a single rating, this can be detected by anyone, preventing
users from spamming ratings to sway public opinion.\r\n\r\nTo evaluate feasibility
of our construction, we present an open-source prototype implementation."
author:
- first_name: Kai
full_name: Bemmann, Kai
last_name: Bemmann
- first_name: Johannes
full_name: Blömer, Johannes
id: '23'
last_name: Blömer
- first_name: Jan
full_name: Bobolz, Jan
id: '27207'
last_name: Bobolz
- first_name: Henrik
full_name: Bröcher, Henrik
id: '41047'
last_name: Bröcher
- first_name: Denis Pascal
full_name: Diemert, Denis Pascal
id: '44071'
last_name: Diemert
- first_name: Fabian
full_name: Eidens, Fabian
id: '25078'
last_name: Eidens
- first_name: Lukas
full_name: Eilers, Lukas
last_name: Eilers
- first_name: Jan Frederik
full_name: Haltermann, Jan Frederik
id: '44413'
last_name: Haltermann
- first_name: Jakob
full_name: Juhnke, Jakob
id: '48090'
last_name: Juhnke
- first_name: Burhan
full_name: Otour, Burhan
last_name: Otour
- first_name: Laurens Alexander
full_name: Porzenheim, Laurens Alexander
id: '47434'
last_name: Porzenheim
- first_name: Simon
full_name: Pukrop, Simon
last_name: Pukrop
- first_name: Erik
full_name: Schilling, Erik
last_name: Schilling
- first_name: Michael
full_name: Schlichtig, Michael
id: '32312'
last_name: Schlichtig
- first_name: Marcel
full_name: Stienemeier, Marcel
last_name: Stienemeier
citation:
ama: 'Bemmann K, Blömer J, Bobolz J, et al. Fully-Featured Anonymous Credentials
with Reputation System. In: Proceedings of the 13th International Conference
on Availability, Reliability and Security - ARES ’18. New York, NY, USA: ACM.
doi:10.1145/3230833.3234517'
apa: 'Bemmann, K., Blömer, J., Bobolz, J., Bröcher, H., Diemert, D. P., Eidens,
F., … Stienemeier, M. (n.d.). Fully-Featured Anonymous Credentials with Reputation
System. In Proceedings of the 13th International Conference on Availability,
Reliability and Security - ARES ’18. New York, NY, USA: ACM. https://doi.org/10.1145/3230833.3234517'
bibtex: '@inproceedings{Bemmann_Blömer_Bobolz_Bröcher_Diemert_Eidens_Eilers_Haltermann_Juhnke_Otour_et
al., place={New York, NY, USA}, title={Fully-Featured Anonymous Credentials with
Reputation System}, DOI={10.1145/3230833.3234517},
booktitle={Proceedings of the 13th International Conference on Availability, Reliability
and Security - ARES ’18}, publisher={ACM}, author={Bemmann, Kai and Blömer, Johannes
and Bobolz, Jan and Bröcher, Henrik and Diemert, Denis Pascal and Eidens, Fabian
and Eilers, Lukas and Haltermann, Jan Frederik and Juhnke, Jakob and Otour, Burhan
and et al.} }'
chicago: 'Bemmann, Kai, Johannes Blömer, Jan Bobolz, Henrik Bröcher, Denis Pascal
Diemert, Fabian Eidens, Lukas Eilers, et al. “Fully-Featured Anonymous Credentials
with Reputation System.” In Proceedings of the 13th International Conference
on Availability, Reliability and Security - ARES ’18. New York, NY, USA: ACM,
n.d. https://doi.org/10.1145/3230833.3234517.'
ieee: K. Bemmann et al., “Fully-Featured Anonymous Credentials with Reputation
System,” in Proceedings of the 13th International Conference on Availability,
Reliability and Security - ARES ’18, Hamburg, Germany.
mla: Bemmann, Kai, et al. “Fully-Featured Anonymous Credentials with Reputation
System.” Proceedings of the 13th International Conference on Availability,
Reliability and Security - ARES ’18, ACM, doi:10.1145/3230833.3234517.
short: 'K. Bemmann, J. Blömer, J. Bobolz, H. Bröcher, D.P. Diemert, F. Eidens, L.
Eilers, J.F. Haltermann, J. Juhnke, B. Otour, L.A. Porzenheim, S. Pukrop, E. Schilling,
M. Schlichtig, M. Stienemeier, in: Proceedings of the 13th International Conference
on Availability, Reliability and Security - ARES ’18, ACM, New York, NY, USA,
n.d.'
conference:
end_date: 2018-08-30
location: Hamburg, Germany
name: ARES 2018 - SECPID
start_date: 2018-08-27
date_created: 2018-06-14T11:19:29Z
date_updated: 2022-01-06T06:59:07Z
ddc:
- '000'
department:
- _id: '64'
doi: 10.1145/3230833.3234517
file:
- access_level: closed
content_type: application/pdf
creator: feidens
date_created: 2018-11-08T10:17:39Z
date_updated: 2018-11-08T10:17:39Z
file_id: '5428'
file_name: react_acs.pdf
file_size: 920843
relation: main_file
file_date_updated: 2018-11-08T10:17:39Z
has_accepted_license: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprint.iacr.org/2018/835
oa: '1'
place: New York, NY, USA
project:
- _id: '1'
name: SFB 901
- _id: '4'
name: SFB 901 - Project Area C
- _id: '13'
name: SFB 901 - Subproject C1
- _id: '44'
name: KogniHome - die mitdenkende Wohnung
publication: Proceedings of the 13th International Conference on Availability, Reliability
and Security - ARES '18
publication_identifier:
isbn:
- 978-1-4503-6448-5
publication_status: accepted
publisher: ACM
quality_controlled: '1'
related_material:
link:
- relation: software
url: https://github.com/upbcuk
status: public
title: Fully-Featured Anonymous Credentials with Reputation System
type: conference
user_id: '25078'
year: '2018'
...
---
_id: '253'
abstract:
- lang: eng
text: Group signatures, introduced by Chaum and van Heyst [15], are an important
primitive in cryptography. In group signature schemes every group member can anonymously
sign messages on behalf of the group. In case of disputes a dedicated opening
manager is able to trace signatures - he can extract the identity of the producer
of a given signature. A formal model for static group signatures schemes and their
security is defined by Bellare, Micciancio, and Warinschi [4], the case of dynamic
groups is considered by Bellare, Shi, and Zhang [5]. Both models define group
signature schemes with a single opening manager. The main difference between these
models is that the number of group members in static schemes is fixed, while in
dynamic schemes group members can join the group over time.
author:
- first_name: Johannes
full_name: Blömer, Johannes
id: '23'
last_name: Blömer
- first_name: Jakob
full_name: Juhnke, Jakob
id: '48090'
last_name: Juhnke
- first_name: Nils
full_name: Löken, Nils
id: '13703'
last_name: Löken
citation:
ama: 'Blömer J, Juhnke J, Löken N. Short Group Signatures with Distributed Traceability.
In: Proceedings of the Sixth International Conference on Mathematical Aspects
of Computer and Information Sciences (MACIS). LNCS. ; 2015:166-180. doi:10.1007/978-3-319-32859-1_14'
apa: Blömer, J., Juhnke, J., & Löken, N. (2015). Short Group Signatures with
Distributed Traceability. In Proceedings of the Sixth International Conference
on Mathematical Aspects of Computer and Information Sciences (MACIS) (pp.
166–180). https://doi.org/10.1007/978-3-319-32859-1_14
bibtex: '@inproceedings{Blömer_Juhnke_Löken_2015, series={LNCS}, title={Short Group
Signatures with Distributed Traceability}, DOI={10.1007/978-3-319-32859-1_14},
booktitle={Proceedings of the Sixth International Conference on Mathematical Aspects
of Computer and Information Sciences (MACIS)}, author={Blömer, Johannes and Juhnke,
Jakob and Löken, Nils}, year={2015}, pages={166–180}, collection={LNCS} }'
chicago: Blömer, Johannes, Jakob Juhnke, and Nils Löken. “Short Group Signatures
with Distributed Traceability.” In Proceedings of the Sixth International Conference
on Mathematical Aspects of Computer and Information Sciences (MACIS), 166–80.
LNCS, 2015. https://doi.org/10.1007/978-3-319-32859-1_14.
ieee: J. Blömer, J. Juhnke, and N. Löken, “Short Group Signatures with Distributed
Traceability,” in Proceedings of the Sixth International Conference on Mathematical
Aspects of Computer and Information Sciences (MACIS), 2015, pp. 166–180.
mla: Blömer, Johannes, et al. “Short Group Signatures with Distributed Traceability.”
Proceedings of the Sixth International Conference on Mathematical Aspects of
Computer and Information Sciences (MACIS), 2015, pp. 166–80, doi:10.1007/978-3-319-32859-1_14.
short: 'J. Blömer, J. Juhnke, N. Löken, in: Proceedings of the Sixth International
Conference on Mathematical Aspects of Computer and Information Sciences (MACIS),
2015, pp. 166–180.'
date_created: 2017-10-17T12:41:41Z
date_updated: 2022-01-06T06:59:07Z
ddc:
- '000'
department:
- _id: '64'
doi: 10.1007/978-3-319-32859-1_14
file:
- access_level: closed
content_type: application/pdf
creator: ups
date_created: 2018-11-02T14:08:23Z
date_updated: 2018-11-02T14:08:23Z
file_id: '5262'
file_name: ShortGroupSignaturesWithDistri.pdf
file_size: 262436
relation: main_file
success: 1
file_date_updated: 2018-11-02T14:08:23Z
has_accepted_license: '1'
language:
- iso: eng
page: 166-180
project:
- _id: '1'
name: SFB 901
- _id: '13'
name: SFB 901 - Subprojekt C1
- _id: '4'
name: SFB 901 - Project Area C
- _id: '44'
name: KogniHome - die mitdenkende Wohnung
publication: Proceedings of the Sixth International Conference on Mathematical Aspects
of Computer and Information Sciences (MACIS)
related_material:
record:
- id: '325'
relation: other
status: public
series_title: LNCS
status: public
title: Short Group Signatures with Distributed Traceability
type: conference
user_id: '13703'
year: '2015'
...