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International Conference on the Theory and Applications of Cryptographic Techniques

EUROCRYPT 2003: Advances in Cryptology — EUROCRYPT 2003 pp 1–16Cite as

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Cryptanalysis of the EMD Mode of Operation

Cryptanalysis of the EMD Mode of Operation

  • Antoine Joux5 
  • Conference paper
  • First Online: 01 January 2003
  • 3559 Accesses

  • 9 Citations

Part of the Lecture Notes in Computer Science book series (LNCS,volume 2656)

Abstract

In this paper, we study the security of the Encrypt-Mask-Decrypt mode of operation, also called EMD, which was recently proposed for applications such as disk-sector encryption. The EMD mode transforms an ordinary block cipher operating on n-bit blocks into a tweakable block cipher operating on large blocks of size nm bits. We first show that EMD is not a secure tweakable block cipher and then describe efficient attacks in the context of disk-sector encryption. We note that the parallelizable variant of EMD, called EME that was proposed at the same time is also subject to these attacks.

In the course of developing one of the attacks, we revisit Wagner’s generalized birthday algorithm and show that in some special cases it performs much more efficiently than in the general case. Due to the large scope of applicability of this algorithm, even when restricted to these special cases, we believe that this result is of independent interest.

Keywords

  • Block Cipher
  • Malicious User
  • Sector Number
  • Blind Signature Scheme
  • Heuristic Analysis

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. J. Black and P. Rogaway. A block-cipher mode of operation for parallelizable message authentication. In L. Knudsen, editor, Advances in Cryptology — Eurocrypt’2002, volume 2332 of Lectures Notes in Computer Science, pages 384–397. Springer, 2002.

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  2. S. Halevi. An Observation regarding Jutla’s modes of operation. Crytology ePrint archive, Report 2001/015, available at http://eprint.iacr.org.

  3. C. Jutla. Encryption modes with almost free message integrity. In B. Pfitzmann, editor, Advances in Cryptology — Eurocrypt’01, volume 2045 of Lectures Notes in Computer Science. Springer-Verlag, 2001.

    Google Scholar 

  4. M. Liskov, R. Rivest, and D. Wagner. Tweakable block ciphers. In M. Yung, editor, Advances in Cryptology — Crypto’2002, volume 2442 of Lectures Notes in Computer Science, pages 31–46. Springer, 2002.

    Google Scholar 

  5. P. Rogaway. The EMD mode of operation (a tweaked, wide-blocksize, strong PRP), September 26th, 2002. Crytology ePrint archive, Report 2002/148, available at http://eprint.iacr.org.

  6. D. Wagner. A generalized birthday problem. In M. Yung, editor, Advances in Cryptology — Crypto’2002, volume 2442 of Lectures Notes in Computer Science, pages 288–303. Springer, 2002.

    Google Scholar 

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Author information

Authors and Affiliations

  1. DCSSI Crypto Lab, 51, Bd de Latour-Maubourg, 75700, Paris 07 SP, France

    Antoine Joux

Authors
  1. Antoine Joux
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Editor information

Editors and Affiliations

  1. Computer Science Department, Technion — Israel Institute of Technology, Haifa, 32000, Israel

    Eli Biham

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© 2003 International Association for Cryptologic Research

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Cite this paper

Joux, A. (2003). Cryptanalysis of the EMD Mode of Operation. In: Biham, E. (eds) Advances in Cryptology — EUROCRYPT 2003. EUROCRYPT 2003. Lecture Notes in Computer Science, vol 2656. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-39200-9_1

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  • DOI: https://doi.org/10.1007/3-540-39200-9_1

  • Published: 13 May 2003

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-14039-9

  • Online ISBN: 978-3-540-39200-2

  • eBook Packages: Springer Book Archive

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