Dynamic audit services for outsourced storages in clouds

Yan Zhu, Gail-Joon Ahn, Hongxin Hu, Sik-Sang Yau, Ho G. An, Chang Jun Hu

Research output: Contribution to journalArticlepeer-review

268 Scopus citations


In this paper, we propose a dynamic audit service for verifying the integrity of an untrusted and outsourced storage. Our audit service is constructed based on the techniques, fragment structure, random sampling, and index-hash table, supporting provable updates to outsourced data and timely anomaly detection. In addition, we propose a method based on probabilistic query and periodic verification for improving the performance of audit services. Our experimental results not only validate the effectiveness of our approaches, but also show our audit system verifies the integrity with lower computation overhead and requiring less extra storage for audit metadata.

Original languageEnglish (US)
Article number5999652
Pages (from-to)227-238
Number of pages12
JournalIEEE Transactions on Services Computing
Issue number2
StatePublished - 2013


  • Storage security
  • audit service
  • cloud storage
  • provable data possession

ASJC Scopus subject areas

  • Hardware and Architecture
  • Computer Science Applications
  • Computer Networks and Communications
  • Information Systems and Management


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