On Some Weaknesses in the Disk Encryption Schemes EME and EME2

  • Authors:
  • Cuauhtemoc Mancillas-López;Debrup Chakraborty;Francisco Rodríguez-Henríquez

  • Affiliations:
  • Department of Computer Science, CINVESTAV-IPN, Av. IPN 2508, Col: San Pedro Zacatenco, Mexico City, Mexico 07360;Department of Computer Science, CINVESTAV-IPN, Av. IPN 2508, Col: San Pedro Zacatenco, Mexico City, Mexico 07360;Department of Computer Science, CINVESTAV-IPN, Av. IPN 2508, Col: San Pedro Zacatenco, Mexico City, Mexico 07360

  • Venue:
  • ICISS '09 Proceedings of the 5th International Conference on Information Systems Security
  • Year:
  • 2009

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Abstract

Tweakable enciphering schemes are a certain type of block-cipher mode of operation which provide security in the sense of a strong pseudo-random permutation. It has been proposed that these types of modes are suitable for in-place disk encryption. Currently there are many proposals available for these schemes. EME is one of the efficient candidate of this category. EME2 is a derivative of EME which is currently one of the candidates of a draft standard for wide block modes by the IEEE working group on storage security. We show some weakness of these two modes assuming that some side channel information is available.