Daniel Demmler, M.Sc.

I am a Ph.D. student and member of the Engineering Cryptographic Protocols (ENCRYPTO) group at the Center for Research in Security and Privacy (CRISP).

My research focuses on the design, implementation and evaluation of secure multi-party computation and private information retrieval protocols, as well as privacy-preserving applications and their practical realization.

In case you want to contact me securely, send me an encrypted e-mail using my undefinedPGP public key. Its fingerprint: 91DC D028 AA37 E1F9 4D06 1BD3 8740 013C 6881 7144.

Contact

S4|14 5.3.10
Mornewegstraße 32
64293 Darmstadt

+49 6151 16-27301

daniel.demmler(a-t)crisp-da.de

Publications

RAID-PIR: Practical multi-server PIR

Author Daniel Demmler, Amir Herzberg, Thomas Schneider
Date November 2014
Kind Inproceedings
PublisherACM
Book title6th ACM Cloud Computing Security Workshop (ACM CCSW'14)
DOI10.1145/2664168.2664181
KeyTUD-CS-2014-0941
Research Areas Engineering Cryptographic Protocols, CASED, CROSSING, Secure Protocols, Secure Data, Engineering, E4, CYSEC
Abstract Private Information Retrieval (PIR) allows to privately request a block of data from a database such that no information about the queried block is revealed to the database owner. With the rapid rise of cloud computing, data is often shared across multiple servers, making multi-server PIR a promising privacy-enhancing technology. In this paper, we introduce RAID-PIR, an efficient and simple multi-server PIR scheme, which has similar approach to RAID (Redundant Arrays of Inexpensive Disks) systems. Each server stores only a part of the database, its computational complexity depends only on this part, and multiple blocks can be queried efficiently in parallel. RAID-PIR improves efficiency over known PIR protocols, using only very efficient cryptographic primitives (pseudo-random generator). We demonstrate that RAID-PIR is practical and well-suited for cloud deployment as it reduces the communication as well as the computational workload per server.
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