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WORM-SEAL: Trustworthy Data Retention and Verification for Regulatory Compliance

  • Tiancheng Li
  • Xiaonan Ma
  • Ninghui Li
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5789)

Abstract

As the number and scope of government regulations and rules mandating trustworthy retention of data keep growing, businesses today are facing a higher degree of regulation and accountability than ever. Existing compliance storage solutions focus on providing WORM (Write-Once Read-Many) support and rely on software enforcement of the WORM property, due to performance and cost reasons. Such an approach, however, offers limited protection in the regulatory compliance setting where the threat of insider attacks is high and the data is indexed and dynamically updated (e.g., append-only access logs indexed by the creator). In this paper, we propose a solution that can greatly improve the trustworthiness of a compliance storage system, by reducing the scope of trust in the system to a tamper-resistant Trusted Computing Base (TCB). We show how trustworthy retention and verification of append-only data can be achieved through the TCB. Due to the resource constraints on the TCB, we develop a novel authentication data structure that we call Homomorphic Hash Tree (HHT). HHT drastically reduces the TCB workload. Our experimental results demonstrate the effectiveness of our approach.

Keywords

Hash Function Leaf Node Main System Data Page Cryptographic Hash Function 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Tiancheng Li
    • 1
  • Xiaonan Ma
    • 2
  • Ninghui Li
    • 1
  1. 1.Department of Computer SciencePurdue UniversityUSA
  2. 2.IBM Almaden Research CenterUSA

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