Special Publication 800-111 Guide to Storage Encryption Technologies for End User Devices Recommendations of the National Institute of Standards and Technology Karen Scarfone Murugiah Souppaya Matt Sexton Guide to Storage Encryption Technologies for End User Devices Recommendations of the National Institute of Standards and Technology Karen Scarfone Murugiah Souppaya Matt Sexton NIST Special Publication 800-111 C O M P U T E R S E C U R I T Y Computer Security Division Information Technology Laboratory National Institute of St andards and Technology Gaithersburg, MD 20899-8930 November 2007 U.S. Department of Commerce Carlos M. Gutierrez, Secretary National Institute of Standards and Technology James M. Turner, Acting Director GUIDE TO STORAGE ENCRYPTION TECHNOLOGIES FOR END USER DEVICES Reports on Computer Systems Technology The Information Technology Laboratory (ITL) at th e National Institute of Standards and Technology (NIST) promotes the U.S. economy and public welfare by providing technical leadership for the nation’s measurement and standards infrastructure. ITL develops tests, test methods, reference data, proof of concept implementations, and technical analysis to advance the development and productive use of information technology. ITL’s responsibilities in clude the development of technical, physical, administrative, and management standards and guide lines for the cost-effective security and privacy of sensitive unclassified information in Federal computer systems. This Special Publication 800-series reports on ITL’s research, guidance, and outreach efforts in computer security and its collaborative activities with industry, government, and academic organizations. Certain commercial entities, equipment, or materials may be identified in this document in order to describe an experimental procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that the entities, materials, or equipment are necessa rily the best available for the purpose. National Institute of Standards and Technology Special Publication 800-111 Natl. Inst. Stand. Technol. Spec. Publ. 800-111, 40 pages (Nov. 2007) iiGUIDE TO STORAGE ENCRYPTION TECHNOLOGIES FOR END USER DEVICES Acknowledgements The authors, Karen Scarfone and Murugiah Souppa ya of the National Institute of Standards and Technology (NIST), and Matt Sexton of Booz Allen Hamilton, wish to thank their colleagues who reviewed drafts of this document and contributed to it s technical content. In particular, their appreciation goes to Tim Grance, Bill Burr, and Tim Polk of NIST, and Derrick Dicoi, Angela Orebaugh, Manuel Villar, Mike Zeberlein, and Mike Zirkle of Booz A llen Hamilton, for their keen and insightful assistance throughout the development of the document. The authors also appreciate the efforts of those individuals, agencies, and other organizations that contributed input during the public comment period. iiiGUIDE TO STORAGE ENCRYPTION TECHNOLOGIES FOR END USER DEVICES Table of Contents Executive Summary.............................................................................................................. ES-1 1. Introduction ................................................................................................................... ...1-1 1.1 Authority...................................................................................................................1-1 1.2 Purpose and Scope .................................................................................................1-1 1.3 Audience..................................................................................................................1-1 1.4 Document Structure