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SP 800-38 E
DRAFT Recommendation for Block Cipher Modes of Operation: The XTS-AES Mode for Confidentiality on Block-Oriented Storage Devices
NIST announces that the Draft NIST Special Publication 800-38E, Recommendation for Block Cipher Modes of Operation: The XTS-AES Mode for Confidentiality on Block-Oriented Storage Devices,
is available for public comment. This document approves the XTS-AES
mode of the AES algorithm by reference to IEEE Std 1619-2007, subject
to one additional requirement, as an option for protecting the
confidentiality of data on block-oriented storage devices. This mode
does not provide authentication, in order to avoid expansion of the
data; however, it does provide some protection against malicious
manipulation of the encrypted data.
The XTS-AES mode was submitted to NIST by the IEEE P1619 Task Group. On
June 5, 2008, NIST initiated a 90-day period of public comment on the
proposal to approve XTS-AES by reference to IEEE Std 1619-2007; during
the comment period, IEEE made available free-of-charge the
specification of the mode in that standard, and other relevant
excerpts. NIST decided to proceed with the proposal after considering
the public comments that NIST received, and follow-up comments from the
IEEE P1619 Task Group, both available at the modes public comment page.
Comments on the text of the Draft NIST SP 800-38E may be submitted to EncryptionModes@xxxxxxxx until September 17, 2009.