PriCloud is a research project supported by Baden-Württemberg Stiftung. The goal of this project is to design and evaluate a distributed file storage service that protects the privacy of their clients and founds a base for productive deployment.

Given that secret services obviously can demand the provider to give access to all available data and resources, we need a cloud-storage service that prevents providers from knowing who stores which data. In the best case the provider does not even know what operations are made on the data on access and by whom. However, business models require that there is still a way of providing revenue stream from the customer to the service provider. With this project, we propose to resolve this seemingly unsolvable contradiction.

Our design incorporates privacy and security from the beginning and is based on the latest developments in privacy enhancing technologies, following a security and privacy by design philosophy. As privacy protection often comes with overhead that contradicts scalability we do not only address the security of our system but also investigate the tradeoffs between the two and develop mechanisms to lessen this problem.

Inspired by Filecoin, we integrate a mechanism for anonymous payment into the storage service, incentivizing participation in our distributed cloud storage network and thus building the base for commercial businesses to participate as file storage providers.

Project Publications

Mödinger, David; Kopp, Henning; Kargl, Frank; Hauck, Franz J.
A Flexible Network Approach to Privacy of Blockchain Transactions
Proceedings of the 38th International Conference on Distributed Computing Systems
July 2018
Mödinger, David; Kopp, Henning; Kargl, Frank; Hauck, Franz J.
Towards Enhanced Network Privacy for Blockchains
Short research statement for the DSN Workshop on Byzantine Consensus and Resilient Blockchains 2018
June 2018
Engelmann, Felix; Kopp, Henning; Kargl, Frank; Glaser, Florian; Weinhardt, Christof
Towards an Economic Analysis of Routing in Payment Channel Networks
Proc. of the 1st Workshop on Scalable and Resilient Infrastruct. for Distrib. Ledgers (SERIAL)
Publisher: ACM,
December 2017
Kopp, Henning; Mödinger, David; Bösch, Christoph; Hauck, Franz; Kargl, Frank
PriCloud: A Distributed File Storage with Financial Incentives
Poster at 1st ForDigital Blockchain Workshop
February 2017
Kopp, Henning; Mödinger, David; Hauck, Franz J.; Kargl, Frank; Bösch, Christoph
Design of a Privacy-Preserving Decentralized File Storage with Financial Incentives
Proc. of IEEE Security & Privacy on the Blockchain (IEEE S&B) (affiliated with EUROCRYPT 2017)
Publisher: IEEE,
ISBN: 978-1-5386-2244-5
Kopp, Henning; Bösch, Christoph; Kargl, Frank
KopperCoin - A Distributed File Storage with Financial Incentives
In Bao, Feng and Chen, Liqun and Deng, Robert H. and Wang, Guojun, editor, Information Security Practice and Experience: 12th International Conference, ISPEC 2016, Proceedings , page 79-93.
Publisher: Springer,
November 2016
ISBN: 978-3-319-49151-6
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