Searchable Attribute-Based Mechanism With Efficient Data Sharing for Secure Cloud Storage

Kaitai Liang, Willy Susilo

Research output: Contribution to journalArticleScientificpeer-review

94 Citations (Scopus)


To date, the growth of electronic personal data leads to a trend that data owners prefer to remotely outsource their data to clouds for the enjoyment of the high-quality retrieval and storage service without worrying the burden of local data management and maintenance. However, secure share and search for the outsourced data is a formidable task, which may easily incur the leakage of sensitive personal information. Efficient data sharing and searching with security is of critical importance. This paper, for the first time, proposes a searchable attribute-based proxy reencryption system. When compared with the existing systems only supporting either searchable attribute-based functionality or attribute-based proxy reencryption, our new primitive supports both abilities and provides flexible keyword update service. In particular, the system enables a data owner to efficiently share his data to a specified group of users matching a sharing policy and meanwhile, the data will maintain its searchable property but also the corresponding search keyword(s) can be updated after the data sharing. The new mechanism is applicable to many real-world applications, such as electronic health record systems. It is also proved chosen ciphertext secure in the random oracle model.

Original languageEnglish
Article number7118738
Pages (from-to)1981-1992
Number of pages12
JournalIEEE Transactions on Information Forensics and Security
Issue number9
Publication statusPublished - 1 Sep 2015
Externally publishedYes


  • encrypted data sharing
  • keyword update
  • Searchable attribute-based encryption

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