Universität Paderborn - Person

Henrik Bröcher

Kontakt

Publikationen

Fakultät für Elektrotechnik, Informatik und Mathematik > Institut für Informatik > Codes und Kryptographie

Wissenschaftlicher Mitarbeiter

VCard

Sonderforschungsbereich 901

Wissenschaftlicher Mitarbeiter

VCard

Telefon:

+49 5251 60-6328

E-Mail:

henrik.broecher(at)upb(dot)de

Büro:

O4.164

Web:

Homepage

Besucher:

Pohlweg 51
33098 Paderborn

Liste im Research Information System öffnen

2022

On the impossibility of surviving (iterated) deletion of weakly dominated strategies in rational MPC

J. Blömer, J. Bobolz, H. Bröcher, 2022

Download

https://eprint.iacr.org/2022/1762

2019

Rational Secure Multiparty Computation

H. Bröcher, Masterarbeit, Universität Paderborn, 2019

Download

thesis_broecher.pdf -

2018

Fully-Featured Anonymous Credentials with Reputation System

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, 2018

Abstract

Downloads

DOI

We present CLARC (Cryptographic Library for Anonymous Reputation and Credentials), an anonymous credentials system (ACS) combined with an anonymous reputation system. Using 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. Furthermore, 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. To evaluate feasibility of our construction, we present an open-source prototype implementation.

Liste im Research Information System öffnen