---
_id: '16487'
author:
- first_name: Jan
  full_name: Bobolz, Jan
  id: '27207'
  last_name: Bobolz
- first_name: Fabian
  full_name: Eidens, Fabian
  id: '25078'
  last_name: Eidens
- first_name: Stephan
  full_name: Krenn, Stephan
  last_name: Krenn
- first_name: Daniel
  full_name: Slamanig, Daniel
  last_name: Slamanig
- first_name: Christoph
  full_name: Striecks, Christoph
  last_name: Striecks
citation:
  ama: 'Bobolz J, Eidens F, Krenn S, Slamanig D, Striecks C. Privacy-Preserving Incentive
    Systems with Highly Efficient Point-Collection. In: <i>Proceedings of the 15th
    ACM Asia Conference on Computer and Communications Security (ASIA CCS ’20),</i>.
    New York, NY, USA: ACM; 2020. doi:<a href="https://doi.org/10.1145/3320269.3384769">10.1145/3320269.3384769</a>'
  apa: 'Bobolz, J., Eidens, F., Krenn, S., Slamanig, D., &#38; Striecks, C. (2020).
    Privacy-Preserving Incentive Systems with Highly Efficient Point-Collection. In
    <i>Proceedings of the 15th ACM Asia Conference on Computer and Communications
    Security (ASIA CCS ’20),</i>. New York, NY, USA: ACM. <a href="https://doi.org/10.1145/3320269.3384769">https://doi.org/10.1145/3320269.3384769</a>'
  bibtex: '@inproceedings{Bobolz_Eidens_Krenn_Slamanig_Striecks_2020, place={New York,
    NY, USA}, title={Privacy-Preserving Incentive Systems with Highly Efficient Point-Collection},
    DOI={<a href="https://doi.org/10.1145/3320269.3384769">10.1145/3320269.3384769</a>},
    booktitle={Proceedings of the 15th ACM Asia Conference on Computer and Communications
    Security (ASIA CCS ’20),}, publisher={ACM}, author={Bobolz, Jan and Eidens, Fabian
    and Krenn, Stephan and Slamanig, Daniel and Striecks, Christoph}, year={2020}
    }'
  chicago: 'Bobolz, Jan, Fabian Eidens, Stephan Krenn, Daniel Slamanig, and Christoph
    Striecks. “Privacy-Preserving Incentive Systems with Highly Efficient Point-Collection.”
    In <i>Proceedings of the 15th ACM Asia Conference on Computer and Communications
    Security (ASIA CCS ’20),</i>. New York, NY, USA: ACM, 2020. <a href="https://doi.org/10.1145/3320269.3384769">https://doi.org/10.1145/3320269.3384769</a>.'
  ieee: J. Bobolz, F. Eidens, S. Krenn, D. Slamanig, and C. Striecks, “Privacy-Preserving
    Incentive Systems with Highly Efficient Point-Collection,” in <i>Proceedings of
    the 15th ACM Asia Conference on Computer and Communications Security (ASIA CCS
    ’20),</i> Taiwan, 2020.
  mla: Bobolz, Jan, et al. “Privacy-Preserving Incentive Systems with Highly Efficient
    Point-Collection.” <i>Proceedings of the 15th ACM Asia Conference on Computer
    and Communications Security (ASIA CCS ’20),</i> ACM, 2020, doi:<a href="https://doi.org/10.1145/3320269.3384769">10.1145/3320269.3384769</a>.
  short: 'J. Bobolz, F. Eidens, S. Krenn, D. Slamanig, C. Striecks, in: Proceedings
    of the 15th ACM Asia Conference on Computer and Communications Security (ASIA
    CCS ’20), ACM, New York, NY, USA, 2020.'
conference:
  location: Taiwan
  name: ASIA CCS'20
date_created: 2020-04-09T10:00:29Z
date_updated: 2022-01-06T06:52:51Z
ddc:
- '000'
department:
- _id: '64'
doi: 10.1145/3320269.3384769
file:
- access_level: closed
  content_type: application/pdf
  creator: feidens
  date_created: 2020-04-09T09:59:03Z
  date_updated: 2020-04-09T09:59:03Z
  file_id: '16488'
  file_name: main.pdf
  file_size: 553623
  relation: main_file
  success: 1
file_date_updated: 2020-04-09T09:59:03Z
has_accepted_license: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://eprint.iacr.org/2020/382
oa: '1'
place: New York, NY, USA
project:
- _id: '1'
  name: SFB 901
- _id: '84'
  name: SFB 901 -Subproject T2
- _id: '82'
  name: SFB 901 - Project Area T
publication: Proceedings of the 15th ACM Asia Conference on Computer and Communications
  Security (ASIA CCS ’20),
publisher: ACM
status: public
title: Privacy-Preserving Incentive Systems with Highly Efficient Point-Collection
type: conference
user_id: '477'
year: '2020'
...
---
_id: '13904'
abstract:
- lang: eng
  text: In this paper, we introduce updatable anonymous credential systems (UACS)
    and use them to construct a new privacy-preserving incentive system. In a UACS,
    a user holding a credential certifying some attributes can interact with the corresponding
    issuer to update his attributes. During this, the issuer knows which update function
    is run, but does not learn the user's previous attributes. Hence the update process
    preserves anonymity of the user. One example for a class of update functions are
    additive updates of integer attributes, where the issuer increments an unknown
    integer attribute value v by some known value k. This kind of update is motivated
    by an application of UACS to incentive systems. Users in an incentive system can
    anonymously accumulate points, e.g. in a shop at checkout, and spend them later,
    e.g. for a discount.
author:
- 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: Denis Pascal
  full_name: Diemert, Denis Pascal
  id: '44071'
  last_name: Diemert
- first_name: Fabian
  full_name: Eidens, Fabian
  id: '25078'
  last_name: Eidens
citation:
  ama: 'Blömer J, Bobolz J, Diemert DP, Eidens F. Updatable Anonymous Credentials
    and Applications to Incentive Systems. In: <i>Proceedings of the 2019 ACM SIGSAC
    Conference on Computer and Communications Security - CCS ’19</i>. Proceedings
    of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS
    ’19. ; 2019. doi:<a href="https://doi.org/10.1145/3319535.3354223">10.1145/3319535.3354223</a>'
  apa: Blömer, J., Bobolz, J., Diemert, D. P., &#38; Eidens, F. (2019). Updatable
    Anonymous Credentials and Applications to Incentive Systems. <i>Proceedings of
    the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19</i>.
    26th ACM Conference on Computer and Communications Security, London. <a href="https://doi.org/10.1145/3319535.3354223">https://doi.org/10.1145/3319535.3354223</a>
  bibtex: '@inproceedings{Blömer_Bobolz_Diemert_Eidens_2019, series={Proceedings of
    the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19},
    title={Updatable Anonymous Credentials and Applications to Incentive Systems},
    DOI={<a href="https://doi.org/10.1145/3319535.3354223">10.1145/3319535.3354223</a>},
    booktitle={Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications
    Security - CCS ’19}, author={Blömer, Johannes and Bobolz, Jan and Diemert, Denis
    Pascal and Eidens, Fabian}, year={2019}, collection={Proceedings of the 2019 ACM
    SIGSAC Conference on Computer and Communications Security - CCS ’19} }'
  chicago: Blömer, Johannes, Jan Bobolz, Denis Pascal Diemert, and Fabian Eidens.
    “Updatable Anonymous Credentials and Applications to Incentive Systems.” In <i>Proceedings
    of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS
    ’19</i>. Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications
    Security - CCS ’19, 2019. <a href="https://doi.org/10.1145/3319535.3354223">https://doi.org/10.1145/3319535.3354223</a>.
  ieee: 'J. Blömer, J. Bobolz, D. P. Diemert, and F. Eidens, “Updatable Anonymous
    Credentials and Applications to Incentive Systems,” presented at the 26th ACM
    Conference on Computer and Communications Security, London, 2019, doi: <a href="https://doi.org/10.1145/3319535.3354223">10.1145/3319535.3354223</a>.'
  mla: Blömer, Johannes, et al. “Updatable Anonymous Credentials and Applications
    to Incentive Systems.” <i>Proceedings of the 2019 ACM SIGSAC Conference on Computer
    and Communications Security - CCS ’19</i>, 2019, doi:<a href="https://doi.org/10.1145/3319535.3354223">10.1145/3319535.3354223</a>.
  short: 'J. Blömer, J. Bobolz, D.P. Diemert, F. Eidens, in: Proceedings of the 2019
    ACM SIGSAC Conference on Computer and Communications Security - CCS ’19, 2019.'
conference:
  end_date: 2019-11-15
  location: London
  name: 26th ACM Conference on Computer and Communications Security
  start_date: 2019-11-11
date_created: 2019-10-18T08:09:44Z
date_updated: 2023-01-10T10:25:27Z
ddc:
- '006'
department:
- _id: '7'
- _id: '64'
doi: 10.1145/3319535.3354223
file:
- access_level: closed
  content_type: application/pdf
  creator: jbobolz
  date_created: 2019-10-18T08:07:49Z
  date_updated: 2019-10-18T08:07:49Z
  file_id: '13907'
  file_name: full_eprinted_v2.pdf
  file_size: 838949
  relation: main_file
file_date_updated: 2019-10-18T08:07:49Z
has_accepted_license: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://eprint.iacr.org/2019/169.pdf
oa: '1'
project:
- _id: '1'
  name: SFB 901
- _id: '4'
  name: SFB 901 - Project Area C
- _id: '13'
  name: SFB 901 - Subproject C1
publication: Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications
  Security - CCS '19
series_title: Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications
  Security - CCS '19
status: public
title: Updatable Anonymous Credentials and Applications to Incentive Systems
type: conference
user_id: '25078'
year: '2019'
...