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Protect Disk Integrity: Solid Security, Fine Performance and Fast Recovery

  • Fangyong Hou
  • Nong Xiao
  • Yuhua Tang
  • Hongjun He
  • Fang Liu
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5576)

Abstract

Hash tree based verification can give solid data integrity protection to disk data; however, it suffers from performance penalty and consistency difficulty. AFI-HTree is proposed to solve such problems. To optimize performance, it utilizes hot-access-windows to buffer the frequently used hash tree nodes to quicken the checking speed. To maintain consistency without compromising security and performance, it fixes the structure of hash tree to make it very regular; then, it applies incremental hash to reduce the update cost of synchronization between the tree and the data; at the end, it records any possible inconsistent states to make fast recovery. In such way, AFI-HTree realizes both high performance and fine consistency, while preserving the required security at the same time. Related approach is elaborated, as well as experiment result. Theoretical analysis and experimental simulation show that it is an optimized way to protect disk data integrity.

Keywords

disk integrity hash tree performance consistency 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Fangyong Hou
    • 1
  • Nong Xiao
    • 1
  • Yuhua Tang
    • 1
  • Hongjun He
    • 1
  • Fang Liu
    • 1
  1. 1.School of ComputerNational University of Defense TechnologyChangshaChina

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