Using Functional  Encryption to Manage  Encrypted  Data

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Mahfoozi, Rohollah | 2013

2007 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45458 (19)
University: Sharif University of Technology
Department: Computer Engineering
Advisor(s): Jalili, Rasool
Abstract:
Recently, many organizations outsource their data on an external server to rescue the trouble of data maintenance. But, data owners do not trust in the external server to enforce defined access control policies. In recent years, many researches was dedicated to cryptographic access control on outsourced data, in order to solve this problem. We introduce a method based on Attribute-based Encryption to enforce access control on outsourced data. In this method we consider policy updating and administrative access control. As a result The owner is not only able to change access control policies on outsourced data but also to define administrative rights (grant/revoke) for some admin users. Our method is
flexible in specifying the access rights of indevidual users and facilitates granting differential access rights to a set of users. Also our method is privacy preserving,as the extrenal server can not obtain users’ access pattern
Keywords:
Cloud Computing ; Access Control ; Database Outsourcing ; Functional Encryption ; Attribute Based Encryption ; Manage Encrypted Data ; Search on Encrypted Data