title: Privacy-Aware Relevant Data Access with Semantically Enriched Search Queries for Untrusted Cloud Storage Services.
abstract: Privacy-aware search of outsourced data ensures relevant data access in the untrusted domain of a public cloud service provider. Subscriber of a public cloud storage service can determine the presence or absence of a particular keyword by submitting search query in the form of a trapdoor. However, these trapdoor-based search queries are limited in functionality and cannot be used to identify secure outsourced data which contains semantically equivalent information. In addition, trapdoor-based methodologies are confined to pre-defined trapdoors and prevent subscribers from searching outsourced data with arbitrarily defined search criteria. To solve the problem of relevant data access, we have proposed an index-based privacy-aware search methodology that ensures semantic retrieval of data from an untrusted domain. This method ensures oblivious execution of a search query and leverages authorized subscribers to model conjunctive search queries without relying on predefined trapdoors. A security analysis of our proposed methodology shows that, in a conspired attack, unauthorized subscribers and untrusted cloud service providers cannot deduce any information that can lead to the potential loss of data privacy. A computational time analysis on commodity hardware demonstrates that our proposed methodology requires moderate computational resources to model a privacy-aware search query and for its oblivious evaluation on a cloud service provider.
authors: School of Engineering and Computing, University of the West of Scotland, Paisley, PA1 2BE, United Kingdom.
authors: Zeeshan
authors: Z
authors: Pervez
authors: Ubiquitous Computing Lab, Department of Computer Engineering, Kyung Hee University, Global Campus, 1 Seocheon-dong, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea.
authors: Mahmood
authors: M
authors: Ahmad
authors: College of Technological Innovation, Zayed University, Abu Dhabi, United Arab Emirates.
authors: Asad Masood
authors: AM
authors: Khattak
authors: Ubiquitous Computing Lab, Department of Computer Engineering, Kyung Hee University, Global Campus, 1 Seocheon-dong, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea.
authors: Sungyoung
authors: S
authors: Lee
authors: Artificial Intelligent Lab, Department of Computer Engineering, Kyung Hee University, Global Campus, 1 Seocheon-dong, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea.
authors: Tae Choong
authors: TC
authors: Chung
mesh_terms: D000465:Algorithms; D000067917:Cloud Computing; D016494:Computer Security; D016247:Information Storage and Retrieval / Q000379:methods; D020407:Internet; D018907:Privacy