منابع مشابه
Attribute-Based Oblivious Access Control
In an attribute-based system (ABS), users are identified by various attributes, instead of their identities. Since its seminal introduction, the attribute-based mechanism has attracted a lot of attention. However, current ABS schemes have a number of drawbacks: (i) the communication cost is linear in the number of the required attributes; (ii) the computation cost is linear in the number of the...
متن کاملOblivious Transfer with Hidden Access Control from Attribute-Based Encryption
The notion of oblivious transfer with hidden access control policies (HACOT) was recently proposed by Camenisch et al. (Public-Key Cryptography 2011). This primitive allows a user to anonymously query a database where each record is protected by a hidden attribute-based access control policy. At each query, the user either learns the value of a single record if the attributes in his key satisfy...
متن کاملAttribute-based Access Control for Cloud-based Electronic Health Record (EHR) Systems
Electronic health record (EHR) system facilitates integrating patients' medical information and improves service productivity. However, user access to patient data in a privacy-preserving manner is still challenging problem. Many studies concerned with security and privacy in EHR systems. Rezaeibagha and Mu [1] have proposed a hybrid architecture for privacy-preserving accessing patient records...
متن کاملBlind attribute-based encryption and oblivious transfer with fine-grained access control
We propose two constructions of oblivious transfer with access control (OTAC), i.e., oblivious transfer schemes in which a receiver can obtain a message only if her attributes, which are certified by a credential issuer, satisfy the access control policy of that message. The receiver remains anonymous towards the sender and the receiver’s attributes are not disclosed to the sender. Our construc...
متن کاملA combination of semantic and attribute-based access control model for virtual organizations
A Virtual Organization (VO) consists of some real organizations with common interests, which aims to provide inter organizational associations to reach some common goals by sharing their resources with each other. Providing security mechanisms, and especially a suitable access control mechanism, which enforces the defined security policy is a necessary requirement in VOs. Since VO is a complex ...
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ژورنال
عنوان ژورنال: The Computer Journal
سال: 2012
ISSN: 0010-4620,1460-2067
DOI: 10.1093/comjnl/bxs061