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1. Privacy-Preserving Distributed Economic Dispatch Protocol for Smart Grid

Author

Mandal, Avikarsha, Armknecht, Frederik, Zenner, Erik, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Weikum, Gerhard, Series Editor, and Gruschka, Nils, editor

Published
2018
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2. Ripple: Overview and Outlook

Author

Armknecht, Frederik, Karame, Ghassan O., Mandal, Avikarsha, Youssef, Franck, Zenner, Erik, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Conti, Mauro, editor, Schunter, Matthias, editor, and Askoxylakis, Ioannis, editor

Published
2015
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3. Towards Symbolic Encryption Schemes

Author

Ahmed, Naveed, Jensen, Christian D., Zenner, Erik, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Foresti, Sara, editor, Yung, Moti, editor, and Martinelli, Fabio, editor

Published
2012
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4. Cryptanalysis of the Light-Weight Cipher A2U2

Author

Abdelraheem, Mohamed Ahmed, Borghoff, Julia, Zenner, Erik, David, Mathieu, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, and Chen, Liqun, editor

Published
2011
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5. Cryptanalysis of ARMADILLO2

Author

Abdelraheem, Mohamed Ahmed, Blondeau, Céline, Naya-Plasencia, María, Videau, Marion, Zenner, Erik, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Lee, Dong Hoon, editor, and Wang, Xiaoyun, editor

Published
2011
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6. A Cryptanalysis of PRINTcipher: The Invariant Subspace Attack

Author

Leander, Gregor, Abdelraheem, Mohamed Ahmed, AlKhzaimi, Hoda, Zenner, Erik, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Rogaway, Phillip, editor

Published
2011
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7. Differential Cryptanalysis of Round-Reduced PRINTcipher: Computing Roots of Permutations

Author

Abdelraheem, Mohamed Ahmed, Leander, Gregor, Zenner, Erik, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, and Joux, Antoine, editor

Published
2011
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8. Cache Timing Analysis of LFSR-Based Stream Ciphers

Author

Leander, Gregor, Zenner, Erik, Hawkes, Philip, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Parker, Matthew G., editor

Published
2009
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9. Nonce Generators and the Nonce Reset Problem

Author

Zenner, Erik, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Samarati, Pierangela, editor, Yung, Moti, editor, Martinelli, Fabio, editor, and Ardagna, Claudio A., editor

Published
2009
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10. A Cache Timing Analysis of HC-256

Author

Zenner, Erik, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Avanzi, Roberto Maria, editor, Keliher, Liam, editor, and Sica, Francesco, editor

Published
2009
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13. The Rabbit Stream Cipher

Author

Boesgaard, Martin, Vesterager, Mette, Zenner, Erik, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Robshaw, Matthew, editor, and Billet, Olivier, editor

Published
2008
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14. Concrete Security for Entity Recognition: The Jane Doe Protocol

Author

Lucks, Stefan, Zenner, Erik, Weimerskirch, André, Westhoff, Dirk, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Chowdhury, Dipanwita Roy, editor, Rijmen, Vincent, editor, and Das, Abhijit, editor

Published
2008
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15. Badger – A Fast and Provably Secure MAC

Author

Boesgaard, Martin, Christensen, Thomas, Zenner, Erik, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Ioannidis, John, editor, Keromytis, Angelos, editor, and Yung, Moti, editor

Published
2005
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19. Ripple: Overview and Outlook

Author

Armknecht, Frederik, primary, Karame, Ghassan O., additional, Mandal, Avikarsha, additional, Youssef, Franck, additional, and Zenner, Erik, additional

Published
2015
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32. Analysis of the End-by-Hop Protocol for Secure Aggregation in Sensor Networks

Author

Zenner, Erik

Abstract

In order to save bandwidth and thus battery power, sensor network measurements are sometimes aggregated en-route while being reported back to the querying server. Authentication of the measurements then becomes a challenge if message integrity is important for the application. At ESAS 2007, the End-by-Hop protocol for securing in-network aggregation for sensor nodes was presented. The solution was claimed to be secure and efficient and to provide the possibility of trading off bandwidth against computation time on the server. In this paper, we disprove these claims. We describe several attacks against the proposed solution and point out shortcomings in the original complexity analysis. In particular, we show that the proposed solution is inferior to a naive solution without in-network aggregation both in security and in efficiency.

Published
2009

33. Cache Timing Analysis of eStream Finalists

Author

Zenner, Erik

Subjects
stream ciphers, Cache timing attacks
Abstract

Cache Timing Attacks have attracted a lot of cryptographic attention due to their relevance for the AES. However, their applicability to other cryptographic primitives is less well researched. In this talk, we give an overview over our analysis of the stream ciphers that were selected for phase 3 of the eStream project.

Published
2009
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34. Why IV Setup for Stream Ciphers is Difficult

Author

Zenner, Erik

Subjects
Stream cipher, IV setup
Abstract

In recent years, the initialization vector (IV) setup has proven to be the most vulnerable point when designing secure stream ciphers. In this paper, we take a look at possible reasons why this is the case, identifying numerous open research problems in cryptography.

Published
2007
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35. On the Role of the Inner State Size in Stream Ciphers

Author

Zenner, Erik

Subjects
004 Informatik
Abstract

Many modern stream ciphers consist of a keystream generator and a key schedule algorithm. In fielded systems, security of the keystream generator is often based on a large inner state rather than an inherently secure design. Note, however, that little theory on the initialisation of large inner states exists, and many practical designs are based on an ad-hoc approach. As a consequence, an increasing number of attacks on stream ciphers exploit the (re-)initialisation of large inner states by a weak key schedule algorithm. In this paper, we propose a strict separation of keystream generator and key schedule algorithm in stream cipher design. A formal definition of inner state size is given, and lower bounds on the necessary inner state size are proposed. After giving a construction for a secure stream cipher from an insecure keystream generator, the limitations of such an approach are discussed. We introduce the notion of inner state size efficiency and compare it for a number of fielded stream ciphers, indicating that a secure cipher can be based on reasonable inner state sizes. Concluding, we ask a number of open questions that may give rise to a new field of research that is concerned with the security of key schedule algorithms.

Published
2004

36. On Cryptographic Properties of LFSR-based Pseudorandom Generators

Author

Zenner, Erik

Subjects
004 Informatik
Abstract

Pseudorandom Generators (PRGs) werden in der modernen Kryptographie verwendet, um einen kleinen Startwert in eine lange Folge scheinbar zufälliger Bits umzuwandeln. Viele Designs für PRGs basieren auf linear feedback shift registers (LFSRs), die so gewählt sind, dass sie optimale statistische und periodische Eigenschaften besitzen. Diese Arbeit diskutiert Konstruktionsprinzipien und kryptanalytische Angriffe gegen LFSR-basierte PRGs. Nachdem wir einen vollständigen Überblick über existierende kryptanalytische Ergebnisse gegeben haben, führen wir den dynamic linear consistency test (DLCT) ein und analysieren ihn. Der DLCT ist eine suchbaum-basierte Methode, die den inneren Zustand eines PRGs rekonstruiert. Wir beschließen die Arbeit mit der Diskussion der erforderlichen Zustandsgröße für PRGs, geben untere Schranken an und Beispiele aus der Praxis, die veranschaulichen, welche Größe sichere PRGs haben müssen.

Published
2004

37. Cryptanalysis of LFSR-based Pseudorandom Generators - a Survey

Author

Zenner, Erik

Subjects
Data_CODINGANDINFORMATIONTHEORY, Hardware_ARITHMETICANDLOGICSTRUCTURES, 004 Informatik
Abstract

Pseudorandom generators based on linear feedback shift registers (LFSR) are a traditional building block for cryptographic stream ciphers. In this report, we review the general idea for such generators, as well as the most important techniques of cryptanalysis.

Published
2004

39. Zenner, Erik

Author

Zenner, Erik and Zenner, Erik

Published
2012

40. Cryptanalysis of ARMADILLO2

Author

Lee, Dong Hoon, Wang, Xiaoyun, Abdelraheem, Mohamed Ahmed, Blondeau, Céline, Naya-Plasencia, María, Videau, Marion, Zenner, Erik, Lee, Dong Hoon, Wang, Xiaoyun, Abdelraheem, Mohamed Ahmed, Blondeau, Céline, Naya-Plasencia, María, Videau, Marion, and Zenner, Erik

Abstract

ARMADILLO2 is the recommended variant of a multi-purpose cryptographic primitive dedicated to hardware which has been proposed by Badel et al. in [1]. In this paper, we describe a meet-in-themiddle technique relying on the parallel matching algorithm that allows us to invert the ARMADILLO2 function. This makes it possible to perform a key recovery attack when used as a FIL-MAC. A variant of this attack can also be applied to the stream cipher derived from the PRNG mode. Finally we propose a (second) preimage attack when used as a hash function.We have validated our attacks by implementing cryptanalysis on scaled variants. The experimental results match the theoretical complexities. In addition to these attacks, we present a generalization of the parallel matching algorithm, which can be applied in a broader context than attacking ARMADILLO2.

Published
2011

42. Cryptanalysis of the Light-Weight Cipher A2U2

Author

Chen, Liqun, Abdelraheem, Mohamed Ahmed, Borghoff, Julia, Zenner, Erik, David, Mathieu, Chen, Liqun, Abdelraheem, Mohamed Ahmed, Borghoff, Julia, Zenner, Erik, and David, Mathieu

Published
2011

43. Fast high-performance modeling tools for many-core architectures

Author

Glimberg, Stefan Lemvig, Engsig-Karup, Allan Peter, Sørensen, Hans Henrik Brandenborg, Gade-Nielsen, Nicolai Fog, Noer, Dennis, Zenner, Erik, Madsen, Morten Gorm, Glimberg, Stefan Lemvig, Engsig-Karup, Allan Peter, Sørensen, Hans Henrik Brandenborg, Gade-Nielsen, Nicolai Fog, Noer, Dennis, Zenner, Erik, and Madsen, Morten Gorm

Published
2011

44. Why IV Setup for Stream Ciphers is Difficult

Author

Biham, Eli, Handschuh, Helena, Lucks, Stefan, Rijmen, Vincent, Zenner, Erik, Biham, Eli, Handschuh, Helena, Lucks, Stefan, Rijmen, Vincent, and Zenner, Erik

Abstract

In recent years, the initialization vector (IV) setup has proven to be the most vulnerable point when designing secure stream ciphers. In this paper, we take a look at possible reasons why this is the case, identifying numerous open research problems in cryptography.

Published
2007

45. Protecting Online Transactions with Unique Embedded Key Generators

Author

Boesgaard, Martin, Zenner, Erik, Boesgaard, Martin, and Zenner, Erik

Abstract

We present a novel approach for protecting transactions over networks. While we use the example of a netbank application, the proposal is relevant for many security-critical transactions. The approach is based on two major changes compared to current solutions. The first one is the use of individualized key derivation functions, which ensure that given the same input, each copy of the application ends up with different keys. The second contribution is the individualizing of program copies by subtle code modification. This makes automated analysis and patching of a client-side application very difficult. In combination, these techniques allow to build a secure channel between the client program and the server, while current solutions only build such a channel between the client computer and the server.

Published
2007

48. Network Security

Author

Hodjat, Alireza, primary, Verbauwhede, Ingrid, additional, Di Pietro, Roberto, additional, Mancini, Luigi V., additional, Mei, Alessandro, additional, Weimerskirch, André, additional, Westhoff, Dirk, additional, Lucks, Stefan, additional, Zenner, Erik, additional, Dimitriou, Tassos, additional, Krontiris, Ioannis, additional, Nikakis, Fotios, additional, Lee, Tian‐Fu, additional, Wen, Hsiang‐An, additional, and Hwang, Tzonelih, additional

Published
2005
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49. Badger - A Fast and Provably Secure MAC.

Author

Ioannidis, John, Keromytis, Angelos, Yung, Moti, Boesgaard, Martin, Christensen, Thomas, and Zenner, Erik

Abstract

We present Badger, a new fast and provably secure MAC based on universal hashing. In the construction, a modified tree hash that is more efficient than standard tree hashing is used and its security is proven. Furthermore, in order to derive the core hash function of the tree, we use a novel technique for reducing Δ-universal function families to universal families. The resulting MAC is very efficient on standard platforms both for short and long messages. As an example, for a 64-bit tag, it achieves performances up to 2.2 and 1.3 clock cycles per byte on a Pentium III and Pentium 4 processor, respectively. The forgery probability is at most 2-52.2. Keywords: MAC, universal hash, tree, pseudo-random generator [ABSTRACT FROM AUTHOR]

Published
2005
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50. Das eStream-Projekt.

Author

Zenner, Erik

Abstract

Copyright of Datenschutz und Datensicherheit - DuD is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2006
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