Protecting encrypted data against key exposure

Thu 13Dec2018
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Katarzyna Kapusta and Gérard Memmi, Telecom ParisTech

From 12.00 until 13.30

At CNB/F/110 (Lunch) + CAB/F/100.9 (Seminar), ETH Zurich

Universitätstrasse 6, 8092 Zurich

Abstract:

Hardening data protection using multiple methods rather than solely encryption is of paramount importance when considering continuous and powerful attacks to spy private and confidential information. Our research focuses on reinforcing data protection using a combination of data fragmentation, encryption, and dispersion. Each operation participates in the increasing of the protection level. We aim at minimizing the additional processing costs due to data fragmentation and dispersion.
In this seminar, we will focus on new fragmentation methods protecting encrypted data against the exposure of the encryption key. They all first transform and then fragment a ciphertext in a way that all of its fragments are needed in order to start the decryption process. Theoretical and experimental evaluations demonstrated that the proposed methods achieve the lowest performance overhead of all of the state-of-the-art techniques.

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