Toggle Main Menu Toggle Search

Open Access padlockePrints

Accountable privacy supporting services

Lookup NU author(s): Professor Thomas Gross


Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


As privacy concerns among consumers rise, service providers increasingly want to provide services that support privacy enhancing technologies. At the same time, online service providers must be able to protect themselves against misbehaving users. For instance, users that do not pay their bill must be held accountable for their behavior. This tension between privacy and accountability is fundamental, however a tradeoff is not always required. In this article we propose the concept of a time capsule, that is, a verifiable encryption with timed and revocable decryptability. The time capsule together with its related protocols offer support of privacy while retaining strong accountability. In our scheme an honest user may enjoy full anonymity, but dishonest users who do not pay their bill have their identity revealed. In contrast to existing revocable anonymity systems, our proposed scheme requires less trust in an external authority, while simultaneously making accountability easier (and less costly) to achieve.

Publication metadata

Author(s): Camenisch J, Gross T, Heydt-Benjamin TS

Publication type: Article

Publication status: Published

Journal: Identity in the Information Society

Year: 2009

Volume: 2

Issue: 3

Pages: 241-267

ISSN (electronic): 1876-0678

Publisher: Springer


DOI: 10.1007/s12394-009-0023-5


Altmetrics provided by Altmetric